# ThinkBack vs todochat

The clearest difference is in-app purchases: todochat at none against ThinkBack's 2. ThinkBack's advantage is update cadence (every 3 days vs fortnightly) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. ThinkBack sells 2 in-app purchases, starting at $1.49 per month. todochat asks for nothing beyond the download.

ThinkBack ships an update every 3 days, todochat fortnightly. Both last shipped on October 1, 2026.

## The numbers

| Metric | ThinkBack | todochat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/thinkback/id1541030401/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 56 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sam Storino](https://appshunter.io/developer/1457262269) | [yernar amergaliyev](https://appshunter.io/developer/1024464916) |

## What reviewers say

### ThinkBack

[App page](https://appshunter.io/ios/app/thinkback/id1541030401)

This app helps you commit information to long-term memory through spaced repetition. It prompts you daily to review notes, organize them with hashtags, and offers private iCloud syncing. Upgrade for enhanced functionality.

**Highlights:** Spaced repetition for memory building, Daily review prompts, Note organization with hashtags, Private iCloud syncing, Search and filter notes, Mark notes as memorized

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.49 | per month |
| Yearly | $14.99 | per year |


### todochat

[App page](https://appshunter.io/ios/app/todochat/id6469604838)

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

**In-app purchases:** none


## Frequently asked questions

### Is ThinkBack free?

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

### Is todochat free?

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

### Do ThinkBack or todochat have ads?

Neither ThinkBack nor todochat shows ads.

### Which is updated more often, ThinkBack or todochat?

ThinkBack ships an update every 3 days, and todochat fortnightly. Most recently, ThinkBack was updated on October 1, 2026 and todochat on October 1, 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.*