# Protractor Smart vs Measure Toolbox

The clearest difference is in-app purchases: Measure Toolbox at none against Protractor Smart's 1. Measure Toolbox also leads on update cadence (every 8 months vs every 21 months) and iOS requirement (10.0 vs 14.0). Protractor Smart's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Protractor Smart sells 1 one-off in-app purchase. Measure Toolbox asks for nothing beyond the download.

Protractor Smart ships an update every 21 months, Measure Toolbox every 8 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Protractor Smart | Measure Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (247 ratings)](https://appshunter.io/ios/app/protractor-smart/id1076530001/reviews)** | — |
| Number of ratings | **247** | — |
| Positive reviews | 43.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Every 8 months** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 72 MB |
| Requires iOS | 14.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [ShenZhen City XueQin Information Technology Inc.](https://appshunter.io/developer/1501019348) |

## What reviewers say

### Protractor Smart

[App page](https://appshunter.io/ios/app/protractor-smart/id1076530001)

This app acts as a smart instrument for measuring angles using your device's camera. It offers two free modes for measuring angles on screen or using a plumb bob for slopes, with an additional premium mode for polygon measurements.

**Highlights:** Camera-based angle measurement, Touch measure mode, Plumb bob measure for slopes, Polygon measurement (premium), Screenshot functionality

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AdBlock - Remove ads | $1.99 | one-time |

**What reviewers like**

- 👍 Useful for measurements
- 👍 Accurate for its purpose
- 👍 Convenient and handy
- 👍 Good for specific tasks (e.g., knife sharpening, stereo mic angles)
- 👍 No excessive charges

**What reviewers complain about**

- 🐛 App freezes/loads indefinitely
- 🐛 Does not launch after updates
- 🐛 Stuck on loading screen
- 🐛 Inaccurate or unstable measurements
- 🐛 Camera quality issues

**Reported bugs**

- App loads indefinitely
- App does not launch after iOS updates
- Stuck on loading screen
- Photo upload not possible in premium version
- Upside-down protractor on iOS

**Requested features**

- Improve camera function (light, zoom)
- Add automatic hold function
- Increase digital readout size
- Add more skins/cosmetics
- Option to remove ads


### Measure Toolbox

[App page](https://appshunter.io/ios/app/measure-toolbox-tape-rule/id1620148344)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Protractor Smart free?

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

### Is Measure Toolbox free?

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

### Do Protractor Smart or Measure Toolbox have ads?

Measure Toolbox shows ads; Protractor Smart does not.

### Which is updated more often, Protractor Smart or Measure Toolbox?

Protractor Smart ships an update every 21 months, and Measure Toolbox every 8 months. Most recently, Protractor Smart was updated on November 6, 2026 and Measure Toolbox on November 3, 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.*