# Decastar vs DocumentDiary

The clearest difference is in-app purchases: Decastar at none against DocumentDiary's 2. Decastar also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price and device support there is nothing between them.

Both are free to download. DocumentDiary sells 2 in-app purchases, starting at $5.99 per month. Decastar asks for nothing beyond the download.

Decastar ships an update every 3 weeks, DocumentDiary every 3 months. Both last shipped on September 29, 2026.

## The numbers

| Metric | Decastar | DocumentDiary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 64 MB | 15 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Decastar - adem](https://appshunter.io/developer/1632916696) | [JULIUS RUDORFER](https://appshunter.io/developer/1863969016) |

## What reviewers say

### Decastar

[App page](https://appshunter.io/ios/app/decastar/id1632916484)

**Features:** macOS Compatibility

**In-app purchases:** none


### DocumentDiary

[App page](https://appshunter.io/ios/app/documentdiary/id6756974469)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DocumentDiary Premium · Monthly | $5.99 | per month |
| DocumentDiary Premium | $22.99 | per 6 months |


## Frequently asked questions

### Is Decastar free?

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

### Is DocumentDiary free?

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

### Do Decastar or DocumentDiary have ads?

DocumentDiary shows ads; Decastar does not.

### Which is updated more often, Decastar or DocumentDiary?

Decastar ships an update every 3 weeks, and DocumentDiary every 3 months. Most recently, Decastar was updated on September 29, 2026 and DocumentDiary on September 29, 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.*