# Simple Calendar (Plan Todo) vs Synote

The clearest difference is ads: Synote at none against Simple Calendar (Plan Todo)'s shown. Synote also leads on update cadence (every 2 weeks vs every 6 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Simple Calendar (Plan Todo) sells 1 one-off in-app purchase and Synote sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Simple Calendar (Plan Todo) ships an update every 6 weeks, Synote every 2 weeks. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Simple Calendar (Plan Todo) | Synote |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 2 weeks** |
| Size | 75 MB | 17 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Huy Huynh](https://appshunter.io/developer/1815003126) | [ZENITH SOFTWARE CORP](https://appshunter.io/developer/1888365268) |

## What reviewers say

### Simple Calendar (Plan Todo)

[App page](https://appshunter.io/ios/app/simple-calendar-plan-todo/id6746109019)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |


### Synote

[App page](https://appshunter.io/ios/app/synote/id6761725997)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Synote Pro Monthly | $4.99 | per month |
| Synote Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is Simple Calendar (Plan Todo) free?

Simple Calendar (Plan Todo) is free to download, with in-app purchases available.

### Is Synote free?

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

### Do Simple Calendar (Plan Todo) or Synote have ads?

Simple Calendar (Plan Todo) shows ads; Synote does not.

### Which is updated more often, Simple Calendar (Plan Todo) or Synote?

Simple Calendar (Plan Todo) ships an update every 6 weeks, and Synote every 2 weeks. Most recently, Simple Calendar (Plan Todo) was updated on October 1, 2026 and Synote on October 9, 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.*