# Mindstone vs Kinnu

The clearest difference is rating: Kinnu at 4.8 against Mindstone's 4.0. Kinnu also leads on review sentiment (87% vs 55%) and ratings volume (494 vs 7). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Mindstone sells 1 one-off in-app purchase and Kinnu sells 4 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Kinnu holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Kinnu has 494 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 55% of Mindstone's written reviews are positive against 87% of Kinnu's.

Mindstone ships an update every 8 days, Kinnu every 6 days. The most recent releases landed on June 1, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Mindstone | Kinnu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (7 ratings)](https://appshunter.io/ios/app/mindstone/id1550729105/reviews) | **[4.8 (494 ratings)](https://appshunter.io/ios/app/kinnu-general-knowledge/id1625333066/reviews)** |
| Number of ratings | 7 | **494** |
| Positive reviews | 54.5% of reviews | **87.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 6 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 174 MB | 101 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Mindstone Learning limited](https://appshunter.io/developer/1550729227) | [Kinnu Limited](https://appshunter.io/developer/1625333068) |

## What reviewers say

### Mindstone

[App page](https://appshunter.io/ios/app/mindstone/id1550729105)

Learn and master in-demand AI skills for your career and business. Access curated content, join a community of experts, and track your progress with AI-powered insights. Upgrade for personalized coaching and skill certifications.

**Highlights:** Curated AI content library, Community-driven learning, Progress tracking and skill profiles, AI-powered coaching (Pro/Enterprise), Personalized adaptive learning (Pro/Enterprise), Renewable skill badges

**Features:** Apple Wallet

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Competency (self-serve) | $39.99 | one-time |


### Kinnu

[App page](https://appshunter.io/ios/app/kinnu-general-knowledge/id1625333066)

This app offers bite-sized learning content across a wide range of subjects, from psychology and science to history and technology. It utilizes cognitive science and a unique "Memory Shield" technology to help users retain information effectively, making learning engaging and fun.

**Highlights:** Bite-sized, expert-edited content, Memory Shield technology for retention, Gamified learning sessions, Community-driven content development, Knowledge Bank progress tracking, Interactive, adaptive questions, Audio versions of content

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Kinnu Certificate | $7.99 | one-time |
| Kinnu Certificate | $14.99 | one-time |
| Kinnu Certificate | $19.99 | one-time |

**What reviewers like**

- 👍 Engaging learning experience
- 🚀 Efficient micro-learning format
- 🔒 No ads or subscriptions
- 💡 Wide range of interesting topics
- 👍 Gamified learning approach

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🐛 Syncing and progress issues
- 🐛 Inaccurate or incomplete information
- 🐛 AI-generated content quality concerns
- 🐛 Inability to contact developers

**Reported bugs**

- Frequent app crashes
- Progress and data loss issues
- Syncing problems
- Compatibility issues with older devices

**Requested features**

- Ability to highlight or take notes
- More in-depth content and sources
- Customization options (e.g., dark mode)
- Ability to connect with others
- Improved notification and reminder system


## Frequently asked questions

### Is Mindstone free?

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

### Is Kinnu free?

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

### Which has better reviews, Mindstone or Kinnu?

Kinnu is rated higher. Mindstone averages 4.0 out of 5 from 7 ratings, while Kinnu averages 4.8 from 494 ratings.

### Do Mindstone or Kinnu have ads?

Neither Mindstone nor Kinnu shows ads.

### Which is updated more often, Mindstone or Kinnu?

Mindstone ships an update every 8 days, and Kinnu every 6 days. Most recently, Mindstone was updated on June 1, 2026 and Kinnu on September 25, 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.*