# Obalwan vs Ballet Protractor

The clearest difference is in-app purchases: Ballet Protractor at none against Obalwan's 1. Ballet Protractor also leads on update cadence (daily vs every 2 weeks) and device support (3 vs 1). Obalwan's advantage is ads (none vs shown). On price and iOS requirement there is nothing between them.

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

Obalwan ships an update every 2 weeks, Ballet Protractor daily. The most recent releases landed on September 7, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Obalwan | Ballet Protractor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Daily** |
| Size | 58 MB | 60 MB |
| Requires iOS | 16.4 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [YUJI Corp.](https://appshunter.io/developer/1721499403) | [Jungmun Choi](https://appshunter.io/developer/1877873773) |

## What reviewers say

### Obalwan

[App page](https://appshunter.io/ios/app/obalwan/id6736524748)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $19.99 | one-time |


### Ballet Protractor

[App page](https://appshunter.io/ios/app/ballet-protractor-leg-angle/id6782101611)

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

**In-app purchases:** none


## Frequently asked questions

### Is Obalwan free?

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

### Is Ballet Protractor free?

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

### Do Obalwan or Ballet Protractor have ads?

Ballet Protractor shows ads; Obalwan does not.

### Which is updated more often, Obalwan or Ballet Protractor?

Obalwan ships an update every 2 weeks, and Ballet Protractor daily. Most recently, Obalwan was updated on September 7, 2026 and Ballet Protractor on September 20, 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.*