# Sitor vs Memo Clock

The clearest difference is in-app purchases: Memo Clock at none against Sitor's 10. Sitor's advantage is update cadence (every 2 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Sitor sells 10 in-app purchases, starting at $11.99 per month. Memo Clock asks for nothing beyond the download.

Sitor ships an update every 2 days, Memo Clock monthly. The most recent releases landed on September 13, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Sitor | Memo Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | — | Free |
| Size | 41 MB | 13 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Sitor Cloud Technology Co., Ltd.](https://appshunter.io/developer/6772942927) | [原赫 张](https://appshunter.io/developer/6780920126) |

## What reviewers say

### Sitor

[App page](https://appshunter.io/ios/app/sitor/id6772958025)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Monthly | $11.99 | per month |
| Pro Monthly | $23.99 | per month |
| Starter Annual | $93.99 | per year |
| Pro Annual | $187.99 | per year |
| 50 Credits | $3.99 | one-time |
| 200 Credits | $12.99 | one-time |
| 500 Credits | $27.99 | one-time |
| 1000 Credits | $49.99 | one-time |
| 3000 Credits | $129.99 | one-time |
| 5000 Credits | $199.99 | one-time |


### Memo Clock

[App page](https://appshunter.io/ios/app/memo-clock/id6780967507)

Capture and review important information efficiently with this minimalist note-taking app. Save text, handwriting, or images as memos and schedule timely reminders for review. Ideal for students preparing for exams by consolidating key points and mistakes.

**Highlights:** Capture text, handwriting, or image memos, Schedule review frequencies and reminders, Ideal for exam preparation, Simple and lightweight interface, Syncs via iCloud

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

**In-app purchases:** none


## Frequently asked questions

### Is Sitor free?

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

### Is Memo Clock free?

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

### Do Sitor or Memo Clock have ads?

Neither Sitor nor Memo Clock shows ads.

### Which is updated more often, Sitor or Memo Clock?

Sitor ships an update every 2 days, and Memo Clock monthly. Most recently, Sitor was updated on September 13, 2026 and Memo Clock on September 6, 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.*