# iPennyVibration vs WhatDiff

The clearest difference is in-app purchases: iPennyVibration at none against WhatDiff's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. WhatDiff sells 3 in-app purchases, starting at $2.99 per month. iPennyVibration asks for nothing beyond the download.

## The numbers

| Metric | iPennyVibration | WhatDiff |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 months |
| Size | 2 MB | 2 MB |
| Requires iOS | **16.1** | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [PoChun Chang](https://appshunter.io/developer/1620672722) | [栋 陈](https://appshunter.io/developer/560090281) |

## What reviewers say

### iPennyVibration

[App page](https://appshunter.io/ios/app/ipennyvibration/id1668529628)

**In-app purchases:** none


### WhatDiff

[App page](https://appshunter.io/ios/app/whatdiff/id6762343310)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WhatDiff Month Subscription | $2.99 | per month |
| WhatDiff Annual Subscription | $12.99 | per year |
| WhatDiff Lifetime License | $24.99 | one-time |


## Frequently asked questions

### Is iPennyVibration free?

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

### Is WhatDiff free?

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

### Do iPennyVibration or WhatDiff have ads?

Neither iPennyVibration nor WhatDiff shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*