XT UART vs Theta
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
XT UART
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The support module functions as a parameter configuration of the slave, data transmission, speed measurement, and the like; Support module as data transmission and speed measurement function from the host; Support encryption and decryption of transparent data; Support device signal filtering and name filtering;
Theta
This application measures the electrical resistance of objects when connected to compatible hardware via Bluetooth. It displays changes in resistance using a needle indicator, providing dynamic readings. The app is designed for informational purposes and is not for medical use.
- Bluetooth LE 4.0 connectivity
- Measures electrical resistance
- Needle indicator for dynamics
- Compatible with e-meter hardware
- Supports watch, iPhone, and iPod
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Theta-Meter e-meter app. Theta-Meter e-meter hardware can be connected to this app using Bleutooth LE 4.0 (or higher). This app measure electric resistence of the object, connected to Theta-Meter e-meter electrodes. This app is not intended to diagnose, treat, cure, or prevent any disease or medical or therapeutic use. Using needle indicator, this app shows the dynamics of changes in the electrical resistance of an object connected to the Theta-Meter device.
Screenshots
Verdict
The clearest difference is update cadence: XT UART at every 4 months against Theta's every 19 months. On price, ads, in-app purchases and device support 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.
XT UART ships an update every 4 months, Theta every 19 months. The most recent releases landed on October 16, 2026 and October 3, 2026 respectively.
| Parameter | XT UART | Theta |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 4 months — better | Every 19 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPod, Apple Watch — better |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Lanke Xuntong Technology Co., Ltd. | Mikhail Fedorov |
In-app purchases
XT UART
No in-app purchases
Theta
No in-app purchases
