# Protractor Smart vs Convertly

The clearest difference is in-app purchases: Convertly at none against Protractor Smart's 1. Convertly also leads on update cadence (every 2 weeks vs every 21 months). Protractor Smart's advantage is ads (none vs shown) and iOS requirement (14.0 vs 17.0). On price and device support there is nothing between them.

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

Protractor Smart ships an update every 21 months, Convertly every 2 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Protractor Smart | Convertly |
| --- | --- | --- |
| 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 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 6 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [Zrindy LLC](https://appshunter.io/developer/1876720455) |

## 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


### Convertly

[App page](https://appshunter.io/ios/app/convertly-calculator-and-units/id6776680385)

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

**In-app purchases:** none


## Frequently asked questions

### Is Protractor Smart free?

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

### Is Convertly free?

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

### Do Protractor Smart or Convertly have ads?

Convertly shows ads; Protractor Smart does not.

### Which is updated more often, Protractor Smart or Convertly?

Protractor Smart ships an update every 21 months, and Convertly every 2 weeks. Most recently, Protractor Smart was updated on November 2, 2026 and Convertly on October 31, 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.*