# IDoList vs Second Brain

The clearest difference is update cadence: Second Brain at every 9 days against IDoList's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. IDoList sells 2 in-app purchases, starting at $2.99 per month and Second Brain sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

IDoList ships an update every 3 weeks, Second Brain every 9 days. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | IDoList | Second Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/second-brain-know-yourself/id6760254340/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 26 MB | 12 MB |
| Requires iOS | 18.5 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NIKLAS NERKAMP](https://appshunter.io/developer/1821713266) | [Liwei Xie](https://appshunter.io/developer/1106616046) |

## What reviewers say

### IDoList

[App page](https://appshunter.io/ios/app/idolist/id6749907556)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IDoList Pro – Monthly | $2.99 | per month |
| IDoList Pro – Yearly | $22.99 | per year |


### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-know-yourself/id6760254340)

This AI-powered journal captures your thoughts via voice or text, automatically organizing and connecting them. It helps you recall memories, discover patterns, and reflect on your growth.

**Highlights:** AI classification, tagging, and summarization, Semantic search by meaning, Three-layer memory system, People cards for relationship tracking, Weekly AI reflections, Voice input with transcription, Data export (JSON + Markdown)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Brain Pro | $4.99 | per month |
| Second Brain Pro | $39.99 | per year |


## Frequently asked questions

### Is IDoList free?

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

### Is Second Brain free?

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

### Do IDoList or Second Brain have ads?

Neither IDoList nor Second Brain shows ads.

### Which is updated more often, IDoList or Second Brain?

IDoList ships an update every 3 weeks, and Second Brain every 9 days. Most recently, IDoList was updated on October 13, 2026 and Second Brain on October 10, 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.*