Theta vs ClampMeter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Theta
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Theta-Meter X Theta-Meter X is a companion application designed to work with compatible Theta-Meter hardware devices. The app connects via Bluetooth Low Energy (BLE 4.0 or higher) or Wi-Fi and displays real-time electrical resistance measurements from objects connected to the device’s electrodes. Key Features: - Real-time visualization of electrical resistance changes - Clear analog-style needle indicator for dynamic monitoring - Bluetooth LE and Wi-Fi connectivity - Simple, user-friendly interface - Stable data transmission from supported hardware devices How It Works When connected to a compatible device, the app measures and displays variations in electrical resistance detected between attached electrodes. The needle indicator provides a continuous visual representation of resistance fluctuations, allowing users to observe dynamic changes over time. Intended Use Theta-Meter X is designed for general experimental, educational, and technical purposes involving electrical resistance measurement. It is intended for use with compatible hardware devices only. Important Notice This application and the associated hardware are not medical devices. They are not intended for diagnosing, treating, curing, preventing, or mitigating any disease or health condition. The app does not provide medical, therapeutic, or psychological advice.
ClampMeter
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Application features: - Multiple Bluetooth clamp meters, such as EM4655、EM4658 -Fully display clamp dial data -Fully control of gear position through Bluetooth Preconditions for using: - Use the AllSun Bluetooth Clamp Meters (EM4655、EM4658) - IOS 8.3 or an updated version is required to support Bluetooth 4.0 and above devices
Screenshots
Verdict
The clearest difference is iOS requirement: ClampMeter at 9.0 against Theta's 17. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Theta ships an update every 3 months, ClampMeter every 2 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.
| Parameter | Theta | ClampMeter |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 17 | 9.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 26 MB |
| Age rating | 12+ | 17+ |
| Developer | Mikhail Fedorov | ZHANGZHOU EASTERN INTELLIGENT METER CO., LTD. |
In-app purchases
Theta
No in-app purchases
ClampMeter
No in-app purchases









