# One Timer vs KeepKnow

The clearest difference is in-app purchases: KeepKnow at none against One Timer's 4. KeepKnow also leads on iOS requirement (13.0 vs 17.6). One Timer's advantage is update cadence (every 4 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. One Timer sells 4 in-app purchases, starting at $1.99 per month. KeepKnow asks for nothing beyond the download.

One Timer ships an update every 4 days, KeepKnow every 3 months. The most recent releases landed on October 5, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | One Timer | KeepKnow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/one-timer-one-tap-timer/id6472574013/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 42 MB | 48 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DAIKI YUASA](https://appshunter.io/developer/1632691655) | [KeepKnow New Energy Limited](https://appshunter.io/developer/1893814746) |

## What reviewers say

### One Timer

[App page](https://appshunter.io/ios/app/one-timer-one-tap-timer/id6472574013)

Easily manage multiple timers simultaneously for everyday tasks like cooking or interval training. Quickly start timers with a single tap and customize their appearance with a wide range of colors. The app offers a premium plan for an ad-free experience and unlimited custom timers.

**Highlights:** Simultaneous multi-timer functionality, One-tap timer launch, Customizable color settings (RGB), Background notifications, HIIT and Pomodoro timer support, Stopwatch for work hours

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM | $1.99 | per month |
| Buy me a coffee | $1.99 | one-time |
| Buy me a burger | $3.99 | one-time |
| PREMIUM | $9.99 | one-time |


### KeepKnow

[App page](https://appshunter.io/ios/app/keepknow/id6762320766)

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

**In-app purchases:** none


## Frequently asked questions

### Is One Timer free?

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

### Is KeepKnow free?

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

### Do One Timer or KeepKnow have ads?

Neither One Timer nor KeepKnow shows ads.

### Which is updated more often, One Timer or KeepKnow?

One Timer ships an update every 4 days, and KeepKnow every 3 months. Most recently, One Timer was updated on October 5, 2026 and KeepKnow on October 15, 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.*