# BT Light vs TMark

The clearest difference is iOS requirement: BT Light at 11.0 against TMark's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

BT Light ships an update every 6 weeks, TMark every 2 months. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | BT Light | TMark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 27 MB | 29 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Beautiful Light Technology Corp.](https://appshunter.io/developer/1208902645) | [Anuj Nigam](https://appshunter.io/developer/1751764206) |

## What reviewers say

### BT Light

[App page](https://appshunter.io/ios/app/bt-light/id1347068408)

**Features:** macOS Compatibility

**In-app purchases:** none


### TMark

[App page](https://appshunter.io/ios/app/tmark/id6752940682)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BT Light free?

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

### Is TMark free?

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

### Do BT Light or TMark have ads?

Neither BT Light nor TMark shows ads.

### Which is updated more often, BT Light or TMark?

BT Light ships an update every 6 weeks, and TMark every 2 months. Most recently, BT Light was updated on October 9, 2026 and TMark on October 1, 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.*