# 一意専心 vs TimeRing

The clearest difference is in-app purchases: 一意専心 at none against TimeRing's 3. 一意専心 also leads on update cadence (every 5 days vs every 3 months). TimeRing's advantage is iOS requirement (14.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. TimeRing sells 3 in-app purchases, starting at $2.00 per month. 一意専心 asks for nothing beyond the download.

一意専心 ships an update every 5 days, TimeRing every 3 months. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 一意専心 | TimeRing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 3 months |
| Size | 2 MB | 134 MB |
| Requires iOS | 16.6 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HIDEKAZU IIDA](https://appshunter.io/developer/1896535723) | [永涛 丁](https://appshunter.io/developer/1885594458) |

## What reviewers say

### 一意専心

[App page](https://appshunter.io/ios/app/id6768064095)

**In-app purchases:** none


### TimeRing

[App page](https://appshunter.io/ios/app/timering-visual-daily-planner/id6778649159)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.00 | per month |
| Yearly | $18.00 | per year |
| Lifetime Local Access | $29.99 | one-time |


## Frequently asked questions

### Is 一意専心 free?

一意専心 is free to download, with no in-app purchases.

### Is TimeRing free?

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

### Do 一意専心 or TimeRing have ads?

Neither 一意専心 nor TimeRing shows ads.

### Which is updated more often, 一意専心 or TimeRing?

一意専心 ships an update every 5 days, and TimeRing every 3 months. Most recently, 一意専心 was updated on October 31, 2026 and TimeRing on November 5, 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.*