# Marlow Diary vs SitterSheet

The clearest difference is update cadence: Marlow Diary at every 4 days against SitterSheet's every 2 months. Marlow Diary also leads on iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Marlow Diary sells 4 in-app purchases, starting at $7.99 per month and SitterSheet sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Marlow Diary ships an update every 4 days, SitterSheet every 2 months. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Marlow Diary | SitterSheet |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 months |
| Size | 50 MB | 4 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Joseph Coleman](https://appshunter.io/developer/1576754395) | [InnovaLabWorks](https://appshunter.io/developer/1888514726) |

## What reviewers say

### Marlow Diary

[App page](https://appshunter.io/ios/app/marlow-diary/id6765477713)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Care | $7.99 | per month |
| Growing Care | $19.99 | per month |
| Small Care | $79.99 | per year |
| Growing Care | $189.99 | per year |


### SitterSheet

[App page](https://appshunter.io/ios/app/sittersheet-babysitter-notes/id6790140213)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SitterSheet Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Marlow Diary free?

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

### Is SitterSheet free?

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

### Do Marlow Diary or SitterSheet have ads?

Neither Marlow Diary nor SitterSheet shows ads.

### Which is updated more often, Marlow Diary or SitterSheet?

Marlow Diary ships an update every 4 days, and SitterSheet every 2 months. Most recently, Marlow Diary was updated on October 4, 2026 and SitterSheet on October 3, 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.*