# Theta-Meter X — Theta-Meter X

> Theta-Meter X (iPhone/iPad app by Mikhail Fedorov.)

- Source: https://appshunter.io/ios/app/theta/id1510300649 (this page in markdown: same URL + `.md`)
- Developer: [Mikhail Fedorov](https://appshunter.io/developer/714735606)
- Category: Utilities
- Price: Free
- Age rating: 12+
- Requires: iOS 17 · 18 MB
- Languages: English
- Released: 2020-07-23
- Data updated: 2026-05-13
- User reviews in markdown: https://appshunter.io/ios/app/theta/id1510300649/reviews.md

## What is Theta?

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.


## Version history (last 5 releases)

### 1.40.1 — 2026-05-12

Improved session timer reliability when switching data sources and during temporary gaps in incoming data

### 1.39.1 — 2026-02-20

Changes in this version:
- Bug fixes
- Added time calculator
- Added new servers for data transfer

### 1.39 — 2026-02-19

Changes in this version:
- Bug fixes
- Added time calculator
- Added new servers for data transfer

### 1.29 — 2023-06-12

- bugs fixes
- support for new devices

### 1.25 — 2021-06-23

- Bug fixes
- Graph added

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## More apps by Mikhail Fedorov

- [Theta-Meter Light](https://appshunter.io/ios/app/theta/id1077931723)
- [Online meter](https://appshunter.io/ios/app/online-meter/id1492697529)
- [Theta-Meter Watch](https://appshunter.io/ios/app/theta/id1525336419)
- [Theta-Meter light](https://appshunter.io/ios/app/theta/id1529290037)
- [Theta-Meter](https://appshunter.io/ios/app/theta/id1541332058)

All apps by Mikhail Fedorov: https://appshunter.io/developer/714735606

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-13.*