# sobolo vs Sudden Reminder

The clearest difference is price: sobolo at Free against Sudden Reminder's $0.99. Sudden Reminder's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

sobolo is free to download; Sudden Reminder costs $0.99 up front. sobolo sells 3 one-off in-app purchases. Sudden Reminder asks for nothing beyond the download.

sobolo ships an update every 10 months, Sudden Reminder daily. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | sobolo | Sudden Reminder |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Daily** |
| Size | 59 MB | 21 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [SEJIN PARK](https://appshunter.io/developer/1571443134) | [GYUGWANG LEE](https://appshunter.io/developer/1759390812) |

## What reviewers say

### sobolo

[App page](https://appshunter.io/ios/app/sobolo-note-and-diary/id6739229779)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $0.49 | one-time |
| Split Frames | $0.49 | one-time |
| No Limits | $0.49 | one-time |


### Sudden Reminder

[App page](https://appshunter.io/ios/app/sudden-reminder/id6754346008)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is sobolo free?

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

### Is Sudden Reminder free?

Sudden Reminder costs $0.99, with no in-app purchases.

### Do sobolo or Sudden Reminder have ads?

sobolo shows ads; Sudden Reminder does not.

### Which is updated more often, sobolo or Sudden Reminder?

sobolo ships an update every 10 months, and Sudden Reminder daily. Most recently, sobolo was updated on October 12, 2026 and Sudden Reminder on October 7, 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.*