# ReadSync vs KanToDo

The clearest difference is ads: ReadSync at none against KanToDo's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. ReadSync sells 1 one-off in-app purchase and KanToDo sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReadSync ships an update every 3 weeks, KanToDo every 5 weeks. The most recent releases landed on November 13, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ReadSync | KanToDo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 4 MB | 43 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Alper Albayrak](https://appshunter.io/developer/993200227) | [Peter Hildel](https://appshunter.io/developer/1750957815) |

## What reviewers say

### ReadSync

[App page](https://appshunter.io/ios/app/readsync-pdf-reader/id6761561640)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $7.99 | one-time |


### KanToDo

[App page](https://appshunter.io/ios/app/kantodo/id6775049762)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iCloudSync & Adfree | $3.99 | one-time |


## Frequently asked questions

### Is ReadSync free?

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

### Is KanToDo free?

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

### Do ReadSync or KanToDo have ads?

KanToDo shows ads; ReadSync does not.

### Which is updated more often, ReadSync or KanToDo?

ReadSync ships an update every 3 weeks, and KanToDo every 5 weeks. Most recently, ReadSync was updated on November 13, 2026 and KanToDo on October 31, 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.*