# i vs Second Brain

The clearest difference is update cadence: Second Brain at every 8 days against i's every 3 months. i's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. i sells 2 in-app purchases, starting at $119.99 per year 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.

i ships an update every 3 months, Second Brain every 8 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | i | 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 months | **Every 8 days** |
| Monetization | — | Freemium |
| Size | 16 MB | 12 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [I-RESONATE TECHNOLOGIES PRIVATE LIMITED](https://appshunter.io/developer/1618598988) | [Liwei Xie](https://appshunter.io/developer/1106616046) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-resonate/id1618598986)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Standard Subscription | $119.99 | per year |
| Pro Yearly Subscription | $239.00 | per year |


### Second Brain

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

Capture thoughts and ideas effortlessly with voice or text input. This app analyzes your weekly entries to provide personalized insights and summaries. It helps you recall past information and manage personal contacts with smart reminders and widgets.

**Highlights:** Weekly self-insight summaries, Voice and text note capture, Search notes by meaning, Contact management with reminders, Home and Lock Screen widgets, Optional iCloud sync, 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 i free?

i 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 i or Second Brain have ads?

Neither i nor Second Brain shows ads.

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

i ships an update every 3 months, and Second Brain every 8 days. Most recently, i was updated on November 3, 2026 and Second Brain on November 5, 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.*