# Second Brain vs VoiceCalendar AI

The clearest difference is in-app purchases: Second Brain at none against VoiceCalendar AI's 2. VoiceCalendar AI's advantage is update cadence (weekly vs monthly) and iOS requirement (16.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. VoiceCalendar AI sells 2 in-app purchases, starting at $3.99 per month. Second Brain asks for nothing beyond the download.

Second Brain ships an update monthly, VoiceCalendar AI weekly. Both last shipped on October 31, 2026.

## The numbers

| Metric | Second Brain | VoiceCalendar AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 37 MB | 6 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dcode](https://appshunter.io/developer/1868391710) | [TZYYCHYI TSAI](https://appshunter.io/developer/6805907324) |

## 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


### VoiceCalendar AI

[App page](https://appshunter.io/ios/app/voicecalendar-ai/id6805907322)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 語音行事曆 AI | $3.99 | per month |
| AI 年費方案 | $22.99 | per year |


## Frequently asked questions

### Is Second Brain free?

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

### Is VoiceCalendar AI free?

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

### Do Second Brain or VoiceCalendar AI have ads?

Neither Second Brain nor VoiceCalendar AI shows ads.

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

Second Brain ships an update monthly, and VoiceCalendar AI weekly. Most recently, Second Brain was updated on October 31, 2026 and VoiceCalendar AI on October 31, 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.*