# Sitaf App vs Smart Protractor

The clearest difference is in-app purchases: Sitaf App at none against Smart Protractor's 2. Sitaf App also leads on iOS requirement (9.0 vs 17.2). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 30, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Sitaf App | Smart Protractor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Size | 45 MB | 8 MB |
| Requires iOS | **9.0** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Tigestim SA](https://appshunter.io/developer/1438083533) | [Jun Yamabe](https://appshunter.io/developer/1732682049) |

## What reviewers say

### Sitaf App

[App page](https://appshunter.io/ios/app/sitaf-app/id1438498957)

**Features:** Vision Pro support

**In-app purchases:** none


### Smart Protractor

[App page](https://appshunter.io/ios/app/smart-protractor/id6746047543)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Sitaf App free?

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

### Is Smart Protractor free?

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

### Do Sitaf App or Smart Protractor have ads?

Neither Sitaf App nor Smart Protractor shows ads.

### Which is updated more often, Sitaf App or Smart Protractor?

Sitaf App ships an update every 2 weeks, and Smart Protractor every 2 weeks. Most recently, Sitaf App was updated on September 30, 2026 and Smart Protractor on October 12, 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.*