# Obliged | Tips Calculator vs OpenShape3D

The clearest difference is in-app purchases: OpenShape3D at none against Obliged | Tips Calculator's 3. OpenShape3D also leads on device support. On price and iOS requirement there is nothing between them.

Both are free to download. Obliged | Tips Calculator sells 3 in-app purchases, starting at $3.99 per month. OpenShape3D asks for nothing beyond the download.

## The numbers

| Metric | Obliged | Tips Calculator | OpenShape3D |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | — | No |
| Update frequency | — | Every 5 days |
| Size | 5 MB | 46 MB |
| Requires iOS | 17.5 | **17.0** |
| Devices | — | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hiddink Development](https://appshunter.io/developer/455564131) | [Laan Labs](https://appshunter.io/developer/310916919) |

## What reviewers say

### Obliged | Tips Calculator

[App page](https://appshunter.io/ios/app/obliged-tips-calculator/id6741365380)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Obliged Monthly | $3.99 | per month |
| Obliged Annual | $24.99 | per year |
| Obliged Lifetime | $69.99 | one-time |


### OpenShape3D

[App page](https://appshunter.io/ios/app/openshape3d/id6792536439)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Obliged | Tips Calculator free?

Obliged | Tips Calculator is free to download, with in-app purchases available.

### Is OpenShape3D free?

OpenShape3D is free to download, with no in-app purchases.

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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.*