# BTMSR vs Angle Finder

The clearest difference is in-app purchases: Angle Finder at none against BTMSR's 2. BTMSR's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. BTMSR sells 2 in-app purchases, starting at $4.99 per month. Angle Finder asks for nothing beyond the download.

BTMSR ships an update every 8 days, Angle Finder every 10 days. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | BTMSR | Angle Finder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/angle-finder-protractor/id6787664104/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 8 days** | Every 10 days |
| Monetization | — | Ad-supported |
| Size | 1 MB | 53 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TCool LTD.](https://appshunter.io/developer/1711330864) | [侃 黄](https://appshunter.io/developer/6772257248) |

## What reviewers say

### BTMSR

[App page](https://appshunter.io/ios/app/btmsr-postech/id6745852846)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BTMSR Monthly Membership | $4.99 | per month |
| BTMSR Annual Membership | $19.99 | per year |


### Angle Finder

[App page](https://appshunter.io/ios/app/angle-finder-protractor/id6787664104)

Measure angles directly on your device using your camera or photos. This tool offers a digital protractor and the ability to place points on images to calculate angles. Results can be saved or shared as PNG screenshots.

**Highlights:** Measure angles with three draggable points, Digital screen protractor, Measure angles over photos, Camera preview for real-world measurements, Save and share PNG screenshots, Local-first workflow

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BTMSR free?

BTMSR is free to download, with in-app purchases available.

### Is Angle Finder free?

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

### Do BTMSR or Angle Finder have ads?

Angle Finder shows ads; BTMSR does not.

### Which is updated more often, BTMSR or Angle Finder?

BTMSR ships an update every 8 days, and Angle Finder every 10 days. Most recently, BTMSR was updated on October 6, 2026 and Angle Finder on October 8, 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.*