# Ypsilon vs IOUly

The clearest difference is in-app purchases: Ypsilon at none against IOUly's 4. IOUly's advantage is iOS requirement (15.6 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. IOUly sells 4 in-app purchases, starting at $3.99 per month. Ypsilon asks for nothing beyond the download.

Ypsilon ships an update fortnightly, IOUly every 8 days. Both last shipped on November 13, 2026.

## The numbers

| Metric | Ypsilon | IOUly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 8 days** |
| Size | 10 MB | 56 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ITYES IT FACTORY S.R.L.](https://appshunter.io/developer/1813250422) | [Serdar OZKAN](https://appshunter.io/developer/1539288181) |

## What reviewers say

### Ypsilon

[App page](https://appshunter.io/ios/app/ypsilon/id6756621905)

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

**In-app purchases:** none


### IOUly

[App page](https://appshunter.io/ios/app/iouly-iou-tracker/id6760676140)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Whos Pro: Monthly | $3.99 | per month |
| Whos Pro: Yearly | $24.99 | per year |
| Lifetime · One-Time Offer | $29.99 | one-time |
| Whos Pro: Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Ypsilon free?

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

### Is IOUly free?

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

### Do Ypsilon or IOUly have ads?

Neither Ypsilon nor IOUly shows ads.

### Which is updated more often, Ypsilon or IOUly?

Ypsilon ships an update fortnightly, and IOUly every 8 days. Most recently, Ypsilon was updated on November 13, 2026 and IOUly on November 13, 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.*