# Protractor vs StuffKeeper

The clearest difference is in-app purchases: Protractor at none against StuffKeeper's 3. StuffKeeper'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. StuffKeeper sells 3 in-app purchases, starting at $1.99 per month. Protractor asks for nothing beyond the download.

Protractor ships an update every 9 days, StuffKeeper fortnightly. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Protractor | StuffKeeper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (14 ratings)](https://appshunter.io/ios/app/protractor-angle-measure/id6630392312/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Fortnightly |
| Monetization | Ad-supported | — |
| Size | 33 MB | 57 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jens Rieckhof](https://appshunter.io/developer/354266124) | [少锋 黎](https://appshunter.io/developer/1549500319) |

## What reviewers say

### Protractor

[App page](https://appshunter.io/ios/app/protractor-angle-measure/id6630392312)

Measure angles precisely using your phone's screen or camera. This intuitive tool allows you to adjust measurement lines and instantly see the angular difference. Ideal for professionals and hobbyists needing quick, accurate angle calculations.

**Highlights:** Angle measurement with adjustable lines, Camera integration for real-world measurements, Freeze function for static measurements, Clean and modern user interface

**Features:** macOS Compatibility

**In-app purchases:** none


### StuffKeeper

[App page](https://appshunter.io/ios/app/stuffkeeper-expiry-tracker/id6789468168)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Auto-Renew | $1.99 | per month |
| Single Month Non-Renewing | $2.99 | one-time |
| Unlock of Premium version | $9.99 | one-time |


## Frequently asked questions

### Is Protractor free?

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

### Is StuffKeeper free?

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

### Do Protractor or StuffKeeper have ads?

Protractor shows ads; StuffKeeper does not.

### Which is updated more often, Protractor or StuffKeeper?

Protractor ships an update every 9 days, and StuffKeeper fortnightly. Most recently, Protractor was updated on October 8, 2026 and StuffKeeper on October 11, 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.*