# Overdue vs Second Brain

The clearest difference is in-app purchases: Overdue at none against Second Brain's 3. Second Brain's advantage is update cadence (every 4 weeks vs every 42 months) and iOS requirement (16.6 vs 18.6). On price, ads and device support there is nothing between them.

Both are free to download. Second Brain sells 3 in-app purchases, starting at $5.99 per 7 days. Overdue asks for nothing beyond the download.

Overdue ships an update every 42 months, Second Brain every 4 weeks. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Overdue | Second Brain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (61 ratings)](https://appshunter.io/ios/app/second-brain-ai-chat/id6446254904/reviews)** |
| Number of ratings | — | **61** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 4 weeks** |
| Monetization | — | Freemium |
| Size | 3 MB | 78 MB |
| Requires iOS | 18.6 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Pedro Leon](https://appshunter.io/developer/975324262) | [Tairs Rzajevs](https://appshunter.io/developer/1576119083) |

## What reviewers say

### Overdue

[App page](https://appshunter.io/ios/app/overdue/id975719095)

**Features:** macOS Compatibility

**In-app purchases:** none


### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-ai-chat/id6446254904)

This AI chatbot uses GPT technology to generate creative content like stories and songs, answer questions, and provide entertainment. It offers a premium subscription for enhanced features and a free trial period.

**Highlights:** AI-powered writing assistance, Story and song generation, Question answering, Joke telling, GPT technology integration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium for one Week | $5.99 | per 7 days |
| Premium for one Month | $9.99 | per month |
| Premium for one Year | $39.99 | per year |


## Frequently asked questions

### Is Overdue free?

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

### Is Second Brain free?

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

### Do Overdue or Second Brain have ads?

Neither Overdue nor Second Brain shows ads.

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

Overdue ships an update every 42 months, and Second Brain every 4 weeks. Most recently, Overdue was updated on September 28, 2026 and Second Brain on October 11, 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.*