OhmXact
Electrical calculation tools
Free · In‑App Purchases
New in 2.0.3: 11 app languages, independent PDF report language, configurable Home, Workshop Library, Projects and clearer engineering results.
OhmXact is a fast, local-first electrical calculator and workspace for the workshop, bench and field.
CALCULATE WITH CLARITY
• Series and parallel resistance, Ohm’s Law, power, voltage divider, LED and resistor colour-code tools
• Technician notation such as 4R7, 4k7 and 2M2
• Engineering result formatting and optional calculation details
ORGANISE REAL WORK
Save calculations, measurements and notes in Projects. Use Workshop Library to manage resistor stock and reference values, compare alternatives, and create local PDF reports in the language you choose.
YOUR LANGUAGE, YOUR DEVICE
OhmXact supports 11 app languages. Choose a separate language for PDF reports. No account, ads, analytics or cloud processing: calculations and Projects stay on your device unless you explicitly share or export them.
PRO AND PRO+
One-time purchases unlock advanced electrical, workshop, automotive and EV tools, plus unlimited Projects and professional reporting. Eligible premium editions can also choose alternate app icons.
CAMERA RESISTOR READER (BETA)
Pro+ includes an on-device Beta assistant for resistor bands. Always verify or correct every band before using the result.
IMPORTANT
OhmXact provides calculation and design guidance. Verify results against manufacturer specifications, applicable requirements and professional judgement before installation.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• OhmXact now supports 11 app languages, with an independent language choice for PDF reports.
• Personalise Home, manage stock and reference values in Workshop Library, and work faster with improved Projects and comparisons.
• See clearer engineering-format results and optional calculation details.
• Eligible Pro and Pro+ customers can choose alternate app icons.
• Usability and reliability refinements across iPhone and iPad.
The developer, Chris Helene, 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
- Chris Helene
- Size
- 21.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 10 more
- English, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Upgrade to OhmXact Pro+ $5.99
- OhmXact Pro+ $12.99
- OhmXact Pro $5.99
- Copyright
- © 2026 Studio KRiX. All rights reserved.