# Second Brain vs Voice AI Planner

The clearest difference is in-app purchases: Second Brain at none against Voice AI Planner's 3. Voice AI Planner's advantage is update cadence (every 2 days vs monthly) and iOS requirement (18.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Voice AI Planner sells 3 in-app purchases, starting at $1.99 per month. Second Brain asks for nothing beyond the download.

Second Brain ships an update monthly, Voice AI Planner every 2 days. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Second Brain | Voice AI Planner |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Size | 37 MB | 23 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dcode](https://appshunter.io/developer/1868391710) | [Daisuke Tamura](https://appshunter.io/developer/6775469014) |

## What reviewers say

### Second Brain

[App page](https://appshunter.io/ios/app/second-brain-ai-note/id6799343264)

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

**In-app purchases:** none


### Voice AI Planner

[App page](https://appshunter.io/ios/app/voice-ai-planner-hituki/id6801950812)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HITUKI+ Monthly | $1.99 | per month |
| HITUKI+ Annual | $9.99 | per year |
| HITUKI+ Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Second Brain free?

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

### Is Voice AI Planner free?

Voice AI Planner is free to download, with in-app purchases available.

### Do Second Brain or Voice AI Planner have ads?

Neither Second Brain nor Voice AI Planner shows ads.

### Which is updated more often, Second Brain or Voice AI Planner?

Second Brain ships an update monthly, and Voice AI Planner every 2 days. Most recently, Second Brain was updated on October 31, 2026 and Voice AI Planner on November 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.*