# Angles vs AInstein

The clearest difference is iOS requirement: AInstein at 13.0 against Angles's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Angles sells 2 in-app purchases, starting at $9.99 per month and AInstein sells 3 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Angles ships an update every 3 weeks, AInstein monthly. The most recent releases landed on September 16, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Angles | AInstein |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/angles-quick-book-summaries/id6503481512/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Freemium | — |
| Size | 6 MB | 70 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Farid Asadi](https://appshunter.io/developer/1748432415) | [Pankaj Kumar](https://appshunter.io/developer/1800497206) |

## What reviewers say

### Angles

[App page](https://appshunter.io/ios/app/angles-quick-book-summaries/id6503481512)

Access a vast library of non-fiction book summaries across many categories. Get quick insights with flash summaries or dive deep with chapter-by-chapter analysis. Personalized AI recommendations enhance your learning journey.

**Highlights:** AI-powered personalized recommendations, Flash summaries for quick insights, Deep chapter-by-chapter analysis, 200+ non-fiction book summaries, Diverse category selection, User-friendly interface

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Angles Premium | $9.99 | per month |
| Angles Premium | $47.90 | per year |


### AInstein

[App page](https://appshunter.io/ios/app/ainstein-notes-and-transcribe/id6746379171)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Unlimited | $7.99 | per 7 days |
| Monthly Unlimited | $14.99 | per month |
| Yearly Unlimited | $89.99 | per year |


## Frequently asked questions

### Is Angles free?

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

### Is AInstein free?

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

### Do Angles or AInstein have ads?

Neither Angles nor AInstein shows ads.

### Which is updated more often, Angles or AInstein?

Angles ships an update every 3 weeks, and AInstein monthly. Most recently, Angles was updated on September 16, 2026 and AInstein on October 18, 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.*