# ERU vs PerfecTime

The clearest difference is update cadence: PerfecTime at weekly against ERU's every 4 weeks. ERU's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ERU ships an update every 4 weeks, PerfecTime weekly. The most recent releases landed on November 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ERU | PerfecTime |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Weekly** |
| Size | 23 MB | 100 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Erciyes University](https://appshunter.io/developer/1679301796) | [TUSTIME](https://appshunter.io/developer/518971069) |

## What reviewers say

### ERU

[App page](https://appshunter.io/ios/app/eru-tip-ots/id6477384539)

**Features:** macOS Compatibility

**In-app purchases:** none


### PerfecTime

[App page](https://appshunter.io/ios/app/perfectime/id6746719914)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ERU free?

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

### Is PerfecTime free?

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

### Do ERU or PerfecTime have ads?

Neither ERU nor PerfecTime shows ads.

### Which is updated more often, ERU or PerfecTime?

ERU ships an update every 4 weeks, and PerfecTime weekly. Most recently, ERU was updated on November 4, 2026 and PerfecTime on October 25, 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.*