# Diagnify vs TodoLadders

The clearest difference is device support: TodoLadders at 3 against Diagnify's 1. TodoLadders also leads on iOS requirement (15.1 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 5 weeks. Both last shipped on September 19, 2026.

## The numbers

| Metric | Diagnify | TodoLadders |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Size | 43 MB | 34 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rem Vision Lab](https://appshunter.io/developer/1720576891) | [Tatsuro Saito](https://appshunter.io/developer/1541469434) |

## What reviewers say

### Diagnify

[App page](https://appshunter.io/ios/app/diagnify/id6474173069)

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

**In-app purchases:** none


### TodoLadders

[App page](https://appshunter.io/ios/app/todoladders/id6762462275)

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

**In-app purchases:** none


## Frequently asked questions

### Is Diagnify free?

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

### Is TodoLadders free?

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

### Do Diagnify or TodoLadders have ads?

Neither Diagnify nor TodoLadders shows ads.

### Which is updated more often, Diagnify or TodoLadders?

Diagnify ships an update every 5 weeks, and TodoLadders every 5 weeks. Most recently, Diagnify was updated on September 19, 2026 and TodoLadders on September 19, 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.*