# ThinkBack vs Atlas

The clearest difference is in-app purchases: Atlas at none against ThinkBack's 2. Atlas also leads on update cadence (daily vs every 3 days). ThinkBack's advantage is iOS requirement (13.0 vs 17.0). 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. Atlas asks for nothing beyond the download.

ThinkBack ships an update every 3 days, Atlas daily. The most recent releases landed on October 18, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ThinkBack | Atlas |
| --- | --- | --- |
| 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 | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 178 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Sam Storino](https://appshunter.io/developer/1457262269) | [Bing Tan](https://appshunter.io/developer/6790159344) |

## 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 |


### Atlas

[App page](https://appshunter.io/ios/app/atlas-private-on-device-ai/id6790159340)

**In-app purchases:** none


## Frequently asked questions

### Is ThinkBack free?

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

### Is Atlas free?

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

### Do ThinkBack or Atlas have ads?

Neither ThinkBack nor Atlas shows ads.

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

ThinkBack ships an update every 3 days, and Atlas daily. Most recently, ThinkBack was updated on October 18, 2026 and Atlas on October 25, 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.*