10 LANGUAGES TechRef now speaks English, Japanese, German, French, Italian, Spanish, Portuguese, Korean, Simplified Chinese and Traditional Chinese. It follows your device language, or choose one in Settings > Language. CSV files stay in English. Cp AND Cpk Measured values now show the process capability indices Cp and Cpk, and they are added to the CSV export. FITS WITH H7 (TechRef Pro) Pick a shaft (g6 to p6) in the tolerance input to see how it fits an H7 hole: clearance, transition or interference, with the maximum and minimum clearance in µm. A new table lists every combination up to 500 mm. TORQUE A new Torque category: N·m, kN·m, N·cm, kgf·m, kgf·cm, lbf·ft, lbf·in and ozf·in. CUTTING SPEED AND FEED A new calculator in Reference: spindle speed, cutting speed and feed rate, in mm and m/min or inch and SFM.

MEASURED VALUES Record as many measured values as you like for each point in a sheet. Every entry updates the count, mean, max, min, range, standard deviation, deviation from target (the tolerance center) and the number of values out of tolerance. Out-of-tolerance values are shown in red. • Tap a value to change or delete it, Edit to reorder, Undo to take back the last change • Record in a different unit from the drawing (drawing in mm, measuring in inches). Target and limits are converted to that unit • Black: as entered. Blue: converted. Red: out of tolerance • Measured values are free and don't count toward the save limit MEASURED VALUES AS CSV Export one row per value to the clipboard or the Files app, with target, limits, deviation, pass/fail and date. Ready to sort or chart in Excel. After exporting, clear the measured values of one part or all sheets at once. Dimensions and tolerances stay. EN, DIN AND BS STANDARD NAMES Alongside ISO and JIS, you can now choose EN, DIN or BS names. Each is officially published by its standards body as technically identical to ISO. General tolerance classes show your standard's name with the ISO form, such as DIN ISO 2768-1 m (ISO 2768-m). HOW TO USE A new How to Use page in Settings explains each feature in brief. The first time you reach a feature, a short tip appears once.

Added standard-based tolerance lookup. Pick an ISO 2768 (general tolerance) or ISO 286 (fit) class, and TechRef shows the upper/lower deviation for the size you entered. The same tables also show under JIS B 0405 / JIS B 0401 names (TechRef Pro). Added general tolerance and fit reference tables (TechRef Pro). Other changes: - Search added to the table list - Choose which classes and ranges appear, in Settings - Added "Reset to Defaults" - Added a "Standards and Data" screen showing sources - Added first-run Quick Setup - Terms are shown again after every update - History is now searchable by standard name - Tables keep their first column and header row in place while scrolling

NEW: TAP DRILL TABLES (TechRef Pro) • Tap drill sizes for Metric (coarse M1–M48, fine M8×1–M48×3), Unified (UNC, UNF, UNEF, #0 to 2") and Whitworth (BSW, 1/16" to 2"). • Every size lists the minimum and maximum minor diameter of the internal thread, so you can tell on the spot whether your drill will do. • Every tap drill size has been checked against a Japanese tap manufacturer's JIS-based chart to confirm it falls within the allowed range. Sizes that could not be verified are not included. IN-APP PURCHASE RENAMED • "Unlimited Saves" is now "TechRef Pro". Along with unlimited saving, it unlocks the tap drill tables. • If you have already purchased, the tap drill tables are included at no extra cost. NEW JAPANESE UNITS • Volume: sho (升), to (斗), hyo (俵) and koku (石). • Weight: the rice-trade units go, sho, to, hyo and koku (1 hyo = 60 kg). • Turn them on in Settings > Units to Show. MORE ACCURATE CONVERSIONS • Factors for oz, ton (UK), shaku, sun, bu, ken, tsubo, lbf, psi, horsepower, BTU, mmHg, torr, knots and more are now calculated from their exact definitions instead of truncated approximations. • The go (合) now follows its legal definition (1 sho = 2401/1331 L). The last digits of some results may change. READABILITY • Numbers no longer wrap mid-value, and screens keep their layout at larger text sizes. • Unit names in the results list now stay on one line. OTHER • On first launch, you are now asked to agree to the Privacy Policy and Disclaimer. Next, I plan to add a feature for saving frequently used tolerances. If there are other features you would like, I am happy to discuss them, within the limits of my understanding and technical skills.

• Fractional drill sizes: the Drill Sizes table now covers number (#80–#1), letter (A–Z) and fractional (1/64"–1") drills, each with inch and mm equivalents. • Drill Sizes (By Size): a new table that merges all three systems into one list sorted by diameter, so you can find the closest drill whichever system it comes from. • Over 90 units, your choice: every unit is now available — bar, atm, mmHg, torr, kgf/cm², knots, Mach, BTU, metric horsepower, microns and more. Choose which ones appear in Settings > Units to Show. Traditional Japanese units can be switched on too.

Usability improvements based on your feedback: - Convert: Category picker now opens below the header with a clearer expand/collapse control; the screen starts compact - Convert & Sheets: Save button now confirms with "Saved" (or "Already saved" if nothing changed) - Convert: Copying results now shows "Copied"; added a hint that rows can be tapped to select - Sheets: Parts and points can now be edited or deleted with a long press, in addition to swiping - Sheets: Simplified the part screen toolbar — secondary actions are grouped under a single menu - History: Entries are now grouped by date - Reference: Tables show a subtle edge fade to indicate more columns to the right - Settings: Larger tap targets for the decimal places control