# いつからいつまで vs 何日経った？

The clearest difference is update cadence: いつからいつまで at every 8 days against 何日経った？'s every 16 months. いつからいつまで also leads on device support (3 vs 1) and iOS requirement (13.2 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

いつからいつまで ships an update every 8 days, 何日経った？ every 16 months. The most recent releases landed on October 18, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | いつからいつまで | 何日経った？ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 16 months |
| Size | 38 MB | 4 MB |
| Requires iOS | **13.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Yoshinobu Ishigaki](https://appshunter.io/developer/1266177182) | [KAZUKI KUBO](https://appshunter.io/developer/936625453) |

## What reviewers say

### いつからいつまで

[App page](https://appshunter.io/ios/app/id1540517050)

**Features:** macOS Compatibility

**In-app purchases:** none


### 何日経った？

[App page](https://appshunter.io/ios/app/id6475248021)

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

**In-app purchases:** none


## Frequently asked questions

### Is いつからいつまで free?

いつからいつまで is free to download, with no in-app purchases.

### Is 何日経った？ free?

何日経った？ is free to download, with no in-app purchases.

### Do いつからいつまで or 何日経った？ have ads?

Neither いつからいつまで nor 何日経った？ shows ads.

### Which is updated more often, いつからいつまで or 何日経った？?

いつからいつまで ships an update every 8 days, and 何日経った？ every 16 months. Most recently, いつからいつまで was updated on October 18, 2026 and 何日経った？ on October 12, 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.*