# T666 vs AngleEyeLite

The clearest difference is update cadence: AngleEyeLite at every 2 months against T666's every 18 months. T666's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

T666 ships an update every 18 months, AngleEyeLite every 2 months. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | T666 | AngleEyeLite |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 40 MB | 9 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MITSUNORI TERAGAMI](https://appshunter.io/developer/883571123) | [株式会社S-CADE](https://appshunter.io/developer/1621269147) |

## What reviewers say

### T666

[App page](https://appshunter.io/ios/app/t666/id1454084770)

**Features:** macOS Compatibility

**In-app purchases:** none


### AngleEyeLite

[App page](https://appshunter.io/ios/app/angleeyelite/id1570640967)

This app uses AI to automatically detect joint angles in real-time, providing auditory feedback at specified angles. It's designed to help users objectively measure and improve their training depth and neuromuscular control.

**Highlights:** AI-driven automatic joint landmark detection, Real-time joint angle calculation, Auditory alerts at specified angles, Parallel mode for femur-to-floor detection, Front and rear camera switching, Intuitive and simple design

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is T666 free?

T666 is free to download, with no in-app purchases.

### Is AngleEyeLite free?

AngleEyeLite is free to download, with no in-app purchases.

### Do T666 or AngleEyeLite have ads?

Neither T666 nor AngleEyeLite shows ads.

### Which is updated more often, T666 or AngleEyeLite?

T666 ships an update every 18 months, and AngleEyeLite every 2 months. Most recently, T666 was updated on September 30, 2026 and AngleEyeLite on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*