# One vs Keepstone

The clearest difference is in-app purchases: One at none against Keepstone's 1. One also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Keepstone sells 1 one-off in-app purchase. One asks for nothing beyond the download.

One ships an update every 3 days, Keepstone every 6 days. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | One | Keepstone |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 6 days |
| Size | 20 MB | 18 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yuga Matsumi](https://appshunter.io/developer/1866567850) | [Pablo Silva](https://appshunter.io/developer/1876877015) |

## What reviewers say

### One

[App page](https://appshunter.io/ios/app/one-line-diary-mood-log/id6757390722)

**Features:** macOS Compatibility

**In-app purchases:** none


### Keepstone

[App page](https://appshunter.io/ios/app/keepstone-time-capsule-diary/id6759112157)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Keepstone Supporter | $0.99 | one-time |


## Frequently asked questions

### Is One free?

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

### Is Keepstone free?

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

### Do One or Keepstone have ads?

Neither One nor Keepstone shows ads.

### Which is updated more often, One or Keepstone?

One ships an update every 3 days, and Keepstone every 6 days. Most recently, One was updated on October 31, 2026 and Keepstone on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*