1) Power results: - Addition of the comparison graph - Addition of the averaging graph - Optimization of the averaging of measurements (mathematical model), now carried out point by point over the entire measurement (it was previously a simple arithmetic mean of the maximum values) 2) All adaptations to iOS 26, in particular: - Minimum iOS version changed from 11 to 12 - The new Liquid Glass display system has been taken into account, through the use of a graphics compatibility mode and some aesthetic adjustments - Verification of the correct display of all screens on all iPhones from 5 to 17 Pro Max, and on all iOS from 12 to 26

Power results: 1) Addition of the function of re-calculation of the results after measurement, allowing modification of all “Weather” and “Car” parameters after the measurement (very useful in case of incorrect initial configuration) 2) Addition of the 3 chapters “Warnings”, “Measurement accuracy”, and “Miscellaneous”, containing the following information: warning codes, average GPS accuracy, accelerometer frequency, GPS frequency, and estimated tyre slip

Following the discovery of serious limitations in the memory data recording system implemented in the previous version 6.1 (particularly regarding maximum storage, which was far below expectations!), a new (and definitive!) memory data recording system significantly more efficient (more disk space available and faster data transfers) has been created, which will allow in future developments (in chronological order): - The increase in the number of results per type and per car (20 currently) - A possible evolution towards data storage on the user's iCloud account, allowing data sharing between user's phones and then data transfer if he changes phone - A possible evolution towards the creation of a Car database directly integrated into the application Note to users in update: All your data (cars, results, setup) will be well preserved thanks to a conversion of these data when first opening this version.

1) New memory data recording system, more efficient (more disk space available and faster data transfers) and more flexible 2) Complete revision of the program for the implementation of this new system 3) Aesthetic improvements of the results & comparison & averaging sheets (power & accelerations & runs flying start) and performance simulation Details of these changes are published on the website in the NEWS section (https://www.perfectpower.ch/index.php/en/news)

Intermediate version without changes, but intended to warn users in the home message of a major change in the next version 6.1 which will be released on June 13, 2025

1) Addition of the information "Wheel power", "Measurement time", and "Measurement distance" in the power results sheets, which will however only become operational in the next version 6.1 2) Addition of 2 warnings to the automated control system for power and acceleration measurements: GPS receiver working, GPS accuracy

1) Aesthetic improvements "Part 1": - Complete revision of all textual screens (22) - Changed the order of results types in results lists 2) Making PerfectPower compatible with the phone's dark mode All mdifications listed and detailed on the site in the News section: https://www.perfectpower.ch/index.php/en/news#C2

Major evolution of the V6 version compared to the V5 version: 1) Ultimate and final optimization of the precision of power and acceleration measurements 2) Power: Addition in the power results sheets of an explanatory text on the "Max speed correction" function ideal in the event of poor GPS reception or failure of this one (indeed, 95% of the measurement accuracy is made by the accelerometer) All mdifications listed and detailed on the site in the News section: https://www.perfectpower.ch/index.php/en/news#C2

Change in precision of pressure units: The hPa remains with a precision of 1 digit after the decimal point, but the in Hg and PSI go from 1 to 2 digits after the decimal point

1) Addition of a function of power results correction on the measurement end max speed (very useful in case of poor GPS reception) 2) Increased the maximum number of results per type (power, accelerations, runs flying start) and per car from 10 to 20 3) Replacement of the old function of automatic recovery of weather data (versions prior to 4.1) by a function of manual recovery of these data in real time and by geolocation on the reference weather site "The Weather Channel"

1) All adaptations to iOS 16 (09/2022) + iOS mini changed from 9 (09/2015) to 11 (09/2017) 2) Equalization of the graphic rendering of all screens both horizontally and vertically for ALL iPhones since the 5 (09/2012), the first iPhone to have a 9/16 screen 3) Ultimate optimization of power and acceleration measurements accuracy (based on the "Accelerometer + GPS" combination) 4) Removal of the function of automatic recovery of weather data 5) Various textual and graphic modifications + Update of all web links (FR/EN guides) The detail of these five modifications is given on the site in the NEWS section: https://www.perfectpower.ch/index.php/en/news#C2

1) All adaptations to iOS 12 2) Stopping any animation during all page changes 3) Lightening & Optimizing the Car page 4) Creation of the Calculation of gear ratios page 5) Moving reprises settings from the Car page to the Setup page, with creation of a dedicated page

Version 4.0.3: 1) IMPORTANT: For all iPhone with iOS 11.2: All graphics (power and accelerations) and performances simulation are automatically and temporarily set to 0, for reasons explained at this link: www.perfectpower-cars.eu/#PPCI 2) Changing the home message accordingly Version 4.0.1: 1) All adaptations to iOS 11 2) Minimum iOS version required: 9 (7 before) - iPhone "min" that can accommodates this OS: iPhone 4S 3) A single mode of power measurement for user simplification (the GPS correction mode becomes this single mode: deletion of the Normal mode -obsolete because on the only basis of the accelerometer- and Rev correction mode -which will be replaced in the next 4.1 version by a "Maximum speed correction" available in the results sheet-) 4) A single mode of acceleration measurement for user simplification (the GPS correction mode becomes this single mode: deletion of the Normal mode -obsolete because on the only basis of the accelerometer-) 5) Optimization of the following two points: - Calculation of losses (losses "under load" -losses proportional to the transmitted torque, "alpha C" type- and "passive" losses -losses independent of the transmitted torque, "a + bV^2" type-) for power measurements - End of curve processing for power measurements 6) Optimization of the GPS correction law of the accelerometer informations for even more precise and regular results, and it is now adapted to all frequencies of GPS receivers (from 1 Hz to 20 Hz or +) 7) Deletion of the general calibration procedure that has become obsolete. 8) Specific calibration time for power and acceleration measurements reduced from 2 s to 1 s 9) Elimination of the taking into account of the pitch (rearing of the car with the acceleration) in the calculations of the power and acceleration measurements in the old Normal mode. 10) Modification of the technic of stopping power and acceleration measurements: if it is still done after 3 seconds of freewheel deceleration, it is now based on GPS informations and no longer accelerometer (gain of "stability", the GPS being insensitive to the parasitic effects of slope and quality of the road) 11) Optimization of the measurement control system 12) Removing the 10 pre-installed cars to leave only one, the default car: Aston Martin DBS 13) Optimization of the following displays: - graphics (power, acceleration) for all types of screens (iPhone 4S, 5 / 5S / 5C, 6 / 6S, SE, 7, 8, 6 + / 6S +, 7+, 8+, X), now perfectly readable and well centered - texts vertically (mostly "sliding" texts) for all types of screens (iPhone 4S, 5 / 5S / 5C, 6 / 6S, SE, 7, 8, 6 + / 6S +, 7+, 8+, X) - texts horizontally for most types of screens (iPhone 4S, 5 / 5S / 5C, 6 / 6S, SE, 7) Note: Text optimization horizontally on the screens of iPhone 6 + / 6S + / 7 + / 8 / 8 + / X is relatively long, it will only be performed in the next 4.1 version, this version 4.0 had to be released as quickly as possible , thank you for your understanding. 14) Track function fully reviewed 15) Automatic weather data recovery fully reviewed to adapt to the new Internet management methods of iOS> = 9 16) Minor retouching: - Changing the home message - Graphic retouching of the different screens 17) Cleaning the program, to remove anything that is not absolutely essential

1) All adaptations to iOS 11 2) Minimum iOS version required: 9 (7 before) - iPhone "min" that can accommodates this OS: iPhone 4S 3) A single mode of power measurement for user simplification (the GPS correction mode becomes this single mode: deletion of the Normal mode -obsolete because on the only basis of the accelerometer- and Rev correction mode -which will be replaced in the next 4.1 version by a "Maximum speed correction" available in the results sheet-) 4) A single mode of acceleration measurement for user simplification (the GPS correction mode becomes this single mode: deletion of the Normal mode -obsolete because on the only basis of the accelerometer-) 5) Optimization of the following two points: - Calculation of losses (losses "under load" -losses proportional to the transmitted torque, "alpha C" type- and "passive" losses -losses independent of the transmitted torque, "a + bV^2" type-) for power measurements - End of curve processing for power measurements 6) Optimization of the GPS correction law of the accelerometer informations for even more precise and regular results, and it is now adapted to all frequencies of GPS receivers (from 1 Hz to 20 Hz or +) 7) Deletion of the general calibration procedure that has become obsolete. 8) Specific calibration time for power and acceleration measurements reduced from 2 s to 1 s 9) Elimination of the taking into account of the pitch (rearing of the car with the acceleration) in the calculations of the power and acceleration measurements in the old Normal mode. 10) Modification of the technic of stopping power and acceleration measurements: if it is still done after 3 seconds of freewheel deceleration, it is now based on GPS informations and no longer accelerometer (gain of "stability", the GPS being insensitive to the parasitic effects of slope and quality of the road) 11) Optimization of the measurement control system 12) Removing the 10 pre-installed cars to leave only one, the default car: Aston Martin DBS 13) Optimization of the following displays: - graphics (power, acceleration) for all types of screens (iPhone 4S, 5 / 5S / 5C, 6 / 6S, SE, 7, 8, 6 + / 6S +, 7+, 8+, X), now perfectly readable and well centered - texts vertically (mostly "sliding" texts) for all types of screens (iPhone 4S, 5 / 5S / 5C, 6 / 6S, SE, 7, 8, 6 + / 6S +, 7+, 8+, X) - texts horizontally for most types of screens (iPhone 4S, 5 / 5S / 5C, 6 / 6S, SE, 7) Note: Text optimization horizontally on the screens of iPhone 6 + / 6S + / 7 + / 8 / 8 + / X is relatively long, it will only be performed in the next 4.1 version, this version 4.0 had to be released as quickly as possible , thank you for your understanding. 14) Track function fully reviewed 15) Automatic weather data recovery fully reviewed to adapt to the new Internet management methods of iOS> = 9 16) Minor retouching: - Changing the home message - Graphic retouching of the different screens 17) Cleaning the program, to remove anything that is not absolutely essential

1) All Internet connections functional again under iOS 9 ==> Automatic recovery of the weather data function available again ==> Guide available again ATTENTION: This 3.4.1 version sold at 12 euros is at the end of its life: three major successive evolutions (4.0, 4.1, 5.0) will take place in the next weeks, which will be displayed respectively at 17, 22, and 27 euros. However, the update will be systematically free from any of these versions.

1) All adaptations to iOS 9 2) Fixed an anomaly occurring on iOS 9 leading to the launch of the English version of PerfectPower on all phones 3) Partial implantation of braking module (it will be available in the next release)

- Fixed a bug on GPS permissions preventing the opening of the application on phones running iOS 7 ==> New separate management of GPS permissions on iOS 7 / iOS 8 - Modification of the home text

- All adaptations to iOS 8.3 - Fixed a minor oversight generating a negative angle and then a false warning in the measurements balance

1) All adjustments to iOS 8.2 2) Optimization of smoothing (maximum level of details of engine behavior for an integral filtering of disturbances), including the suppression of adaptive smoothing 3) Optimization the very end of the curve 4) Optimization of the GPS correction 5) Reduction from 5s to 3s of the automatic output duration of a measurement on freewheel 6) Optimization of the calibration procedure (simplified, images modified / new texts FR / EN) 7) Optimization of the management and the graphic interface of the Perfs screen 8) Optimization of the measurement balance 9) Optimization of the management of the "GPS Correction" and "Rev Correction" modes and the graphic interface of the Setup screen 10) Definitive suppression of the "pitch" parameter and standardization of its value to 3.0 ° / g in the calculations of Normal mode. 11) Temporary suppression of the display of the calculated pitch and state (on / off) of the Rev correction in the Power results sheets. These sheets will be reorganized in the v3.4. 12) Optimization of the management of the inertial unit (accelerometer + gyroscope) in all the screens using it (Perfs, Track, Calibration) for less battery consumption 13) Optimization of the management of the GPS receiver in all the screens using it (Perfs, Track, Weather) for less battery consumption, and adaptation to the new security norms of iOS 8 on location permissions 14) Partial optimization of the management of the automatic recovery of the weather data (total optimization in the v3.4) 15) Minor retouching of certain texts FR / EN & Graphical interfaces

1) Adaptations to iOS 7.1 2) General review of the program 3) Optimization of the general calibration (taken from PerfectPower Android whose release is planned for early summer) 4) Duration of the specific calibration reduced from 3s to 2s (taken from PerfectPower Android) 5) Optimization of the accuracy of the calculation of accelerations (taken from PerfectPower Android) 6) Authorization of registering values compatible with motorcycles in the Car sheet (a real motorcycle mode will be created later due to user requests). Examples: mini mass reduced from 900 lb to 50 lb, mini engine displacement reduced from 400 cm3 to 50 cm3, final ratio (= primary * secondary) max increased to 15 7) Minor graphics retouching

- Authorization of installation and / or update only to smartphones equipped with at least iOS 7, because PerfectPower 3.1 has been developed specifically for this OS, radically different from older

1) Full review / optimization of the program, in order to facilitate its porting to Android OS 2) Refinement of the new method of filtering the acceleration implemented in the 2.8 version 3) Re-implantation of the "GPS correction" MODE, after an improvement of the filtering of the GPS signal, and in anticipation of the improvement of the quality of smartphones GPS receivers 4) Full review of all the screens of the application (some of them have been corrupted during the transition to iOS 7 ( text and / or buttons "hidden », or superimposed) . Aestheticization of all these screens at this occasion 5) Review of all the images illustrating the different calibration steps, corrupted during the transition to iOS 7 6) Reduction of waiting time in the different calibration steps from 15 s to 10 s . 7) Decrease of the threshold of tolerated phone moving during the waiting of the starting from 5 ° to 3 ° 8) Refinement of the automatic detection of the start to hundredth of a second 9) Minor modifications of some FR / EN texts

1) New "Circuit" page 100% operational: LapTimer (max 30 laps), total time, longitudinal & lateral accelerations, instantaneous speed, average speed, total distance 2) Addition of three fields in the Power results sheets: Rev Correction, measurement end rev, calculated pitch 3) New processing when there is no cars registered: Message "Empty list" displayed in the Perfs screen, and blocking of the measurements while at least one car has not been created 4) Optimization of the new method of filtering the acceleration implemented in version 2.8, for curves now perfectly accurate at any point and for any car 5) Decrease of the braking threshold for the automatic stop of the application, passing from 3.0 to 2.0 m/s2 6) Removing of the automatic GPS correction in case of failing mounting, because of the too poor quality of the GPS receiver of the current smartphones, and the GPS reception also too poor with some mounting (especially seat) 7) Removing of the warning 10 (failing mounting / stability during measurement), because of the redundancy with warnings 7, 8, and 9 (failing mounting / stability on each of the 3 axis) 8) Disabling of the highlighting of the result rectangles when pressed 9) Increase of the tolerance threshold of the Rev correction from 10% to 20% 10) Modification of the 10 Car sheets created by default in the application for the new purchasers: the manufacturer weights are replaced by real weights (measured by car magazines), and some pitches are slightly increased as consequence of results of measurement of new cars 11) Minor modifications of some FR / EN texts

1) New method of filtering the acceleration in the program, keeping the separate filtering of the engine vibrations and the road irregularities, and adaptation of the self-adaptive smoothing to this new method. The old method did not allow an ideal treatment of the end of the curve on the cars taking their max power at the rev limiter (BMW M3 V8), shooting is now corrected! 2) Improvement of the detection of phone sliding during the specific calibration, triggering the warning 2 3) Increase of the threshold for switching to automatic GPS correction from 10% to 20%, in case of incorrect phone mounting identified by the triggering of the warning 10. And slight modification of the correction then performed. 4) Softening of the automatic stop condition of the application on braking, remaining at 3.0 m/s2 (slowdown), but over a shorter time 5) Minor modifications of the home text and some FR/EN texts 6) Link directly to the guide of the site, and not to the mobile guide, which disappears

1) Comparison and averaging of two to four measurements (accelerations, reprises, power) 2) Optimisation of the treatment of the end of the curve, for perfect powers to the rev limiter 3) Strong improvement of the self-adaptive curves smoothing, much more powerful 4) Optimisation of the automatic detection of the start at hundredth of a second, for the most accurate acceleration times 5) Strong hardening of the automatic stop condition of the application on braking, passing from 2 to 3 m/s2, and on a extended duration 6) Adding of a tenth warning for the phone mounting (sliding during the measurement) 7) Remove of the "GPS Correction" mode because of the too low quality of the smartphones GPS, BUT this mode is replaced by a system of automatic and variable GPS correction of the measurements (acceleration and power), in case of failing phone mounting indicated by the new warning number ten, and provided that the measurement duration exceeds twelve seconds and that the GPS accuracy is better than 10 meters (33 feet) 8) Halving the tolerance of the "Rev Correction" (20% to 10%) to reduce the risk of erroneous results due to improper setting of the gear and final ratios / bridge and / or tire size and / or end measurement rev (for power only) 9) Minor modifications of the Perfs ans Setup screens 10) Minor modifications of some FR / EN texts