# One vs Ember

The clearest difference is in-app purchases: One at none against Ember's 1. One also leads on ads (none vs shown) and update cadence (every 3 days vs every 3 weeks). On price there is nothing between them.

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

One ships an update every 3 days, Ember every 3 weeks. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | One | Ember |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Size | 20 MB | 12 MB |
| Requires iOS | **13.0** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuga Matsumi](https://appshunter.io/developer/1866567850) | [丽佳 施](https://appshunter.io/developer/1894580777) |

## What reviewers say

### One

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Ember

[App page](https://appshunter.io/ios/app/ember-private-diary/id6769777961)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ember Pro | $0.99 | one-time |


## Frequently asked questions

### Is One free?

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

### Is Ember free?

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

### Do One or Ember have ads?

Ember shows ads; One does not.

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

One ships an update every 3 days, and Ember every 3 weeks. Most recently, One was updated on October 31, 2026 and Ember on October 28, 2026.

---

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