# Brain Boost vs Iris

The clearest difference is rating: Brain Boost at 4.8 against Iris's 3.7. Brain Boost also leads on iOS requirement (16.0 vs 26.0). Iris's advantage is ads (none vs shown) and ratings volume (12 vs 4). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Brain Boost sells 5 in-app purchases, starting at $2.99 per 7 days and Iris sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Brain Boost holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 4 and 12 respectively.

Brain Boost ships an update every 10 days, Iris fortnightly. The most recent releases landed on September 22, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Brain Boost | Iris |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/brain-boost-ai-chatbot/id1666176202/reviews)** | [3.7 (12 ratings)](https://appshunter.io/ios/app/iris-voice-computer/id6737017937/reviews) |
| Number of ratings | 4 | **12** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | Free with in-app purchases | Freemium |
| Size | 38 MB | 145 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 12+ |
| Developer | [MobiGlance](https://appshunter.io/developer/484122622) | [Kpaw, LLC](https://appshunter.io/developer/1275307195) |

## What reviewers say

### Brain Boost

[App page](https://appshunter.io/ios/app/brain-boost-ai-chatbot/id1666176202)

This AI-powered productivity tool offers a suite of prompts and templates to help users generate content, brainstorm ideas, and streamline tasks. It features AI chat capabilities for instant feedback and inspiration, assisting with everything from writing letters to scripting videos.

**Highlights:** AI-powered prompts and templates, Content generation for letters and videos, AI chat for brainstorming, Writer's block assistance, Idea generation, Task completion assistance

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $2.99 | per 7 days |
| Premium Weekly | $5.99 | per 7 days |
| Premium Monthly | $7.99 | per month |
| Premium Monthly | $14.99 | per month |
| Premium Annual | $49.99 | per year |


### Iris

[App page](https://appshunter.io/ios/app/iris-voice-computer/id6737017937)

This app leverages voice commands to help you draft messages, take notes, engage in conversations, and ask questions. It aims to streamline daily tasks and information retrieval through intuitive voice interaction.

**Highlights:** Draft messages with voice, Take and recall voice notes, Engage in long conversations, Ask knowledge-based questions, Iterate and rewrite messages, Syncs across Apple devices

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium access | $4.99 | per month |


## Frequently asked questions

### Is Brain Boost free?

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

### Is Iris free?

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

### Which has better reviews, Brain Boost or Iris?

Brain Boost is rated higher. Brain Boost averages 4.8 out of 5 from 4 ratings, while Iris averages 3.7 from 12 ratings.

### Do Brain Boost or Iris have ads?

Brain Boost shows ads; Iris does not.

### Which is updated more often, Brain Boost or Iris?

Brain Boost ships an update every 10 days, and Iris fortnightly. Most recently, Brain Boost was updated on September 22, 2026 and Iris on October 7, 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.*