WattGuru
Electrical tools and meters
Free · In‑App Purchases
Your digital electrical toolbox: calculate, plan, log meter readings and keep useful results organised across your Apple devices.
WattGuru turns your iPhone, iPad and Mac into a practical toolbox for electricity and energy. Calculate values, document meter readings and save calculation cases clearly – without a WattGuru account, advertising or tracking.
ELECTRICAL TOOLS
- Ohm's law from any two known values
- Power and current for DC, single-phase AC and three-phase AC
- Cable cross-section, voltage drop and maximum cable length
- Energy, runtime, battery charging and consumption costs
- Series and parallel resistor networks plus voltage dividers
- Conversion of electrical units
METERS AND COSTS
Record household, sub, appliance, generation and storage meters. Log standard and off-peak readings, follow consumption and costs in charts, and exchange your own data using CSV when needed.
PROJECTS AND REFERENCE
Save calculator results together with inputs and assumptions in projects. The built-in reference explains voltage, current, power, energy, cables, protective measures and safe measurement in clear language.
PRIVATE AND AVAILABLE ACROSS DEVICES
Your data stays on your device by default. Optional iCloud sync keeps meters, tariffs and projects in step across your own Apple devices. cgNetsphere does not receive this content. WattGuru includes no advertising, tracking or analytics services.
WattGuru is a calculation, planning and documentation aid. Work on electrical installations must be carried out by qualified people. Applicable standards, protective measures and manufacturer instructions always take precedence.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This correctness update improves how WattGuru evaluates different meter types and measurement directions. Overlapping meters are no longer added together in a potentially misleading total. Tariffs and currencies are handled more consistently, while projections and states with insufficient data are clearer and more precise. The update also includes smaller display, stability and support improvements.
The developer, Michael Caklec, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Michael Caklec
- Size
- 10 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 15.6 or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
English and 23 more
- English, Bulgarian, Croatian, Czech, Danish, Dutch, Estonian, Finnish, French, German, Greek, Hungarian, Irish, Italian, Latvian, Lithuanian, Maltese, Polish, Portuguese, Romanian, Slovak, Slovenian, Spanish, Swedish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- WattGuru Full Version $3.99
- Copyright
- © 2026 cgNetsphere
