# One Diary! vs FSSD

The clearest difference is price: FSSD at Free against One Diary!'s $0.99. FSSD also leads on in-app purchases (none vs 3) and ads (none vs shown). One Diary!'s advantage is update cadence (fortnightly vs every 6 months). On device support and iOS requirement there is nothing between them.

FSSD is free to download; One Diary! costs $0.99 up front. One Diary! sells 3 one-off in-app purchases. FSSD asks for nothing beyond the download.

One Diary! ships an update fortnightly, FSSD every 6 months. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | One Diary! | FSSD |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/one-diary/id1359597080/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 91.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 57 MB | 53 MB |
| Requires iOS | **10.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [岚 甘](https://appshunter.io/developer/1228166609) | [Shenzhen Invincible Four Season Technology Co., Ltd.](https://appshunter.io/developer/1686851585) |

## What reviewers say

### One Diary!

[App page](https://appshunter.io/ios/app/one-diary/id1359597080)

Easily record your daily life with beautiful templates and summaries. This app helps you build a habit of journaling, offers secure storage, and allows sharing your memories.

**Highlights:** Daily diary entries, Beautiful diary templates, Cloud backup and sync, Shareable diary cards, Daily writing reminders, Password protection, PDF export

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| cup of drink | $0.99 | one-time |
| doughnut | $1.99 | one-time |
| steak | $4.99 | one-time |


### FSSD

[App page](https://appshunter.io/ios/app/fssd/id6450849738)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is One Diary! free?

One Diary! costs $0.99, and also offers in-app purchases.

### Is FSSD free?

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

### Do One Diary! or FSSD have ads?

One Diary! shows ads; FSSD does not.

### Which is updated more often, One Diary! or FSSD?

One Diary! ships an update fortnightly, and FSSD every 6 months. Most recently, One Diary! was updated on October 7, 2026 and FSSD on October 8, 2026.

---

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