# MindStream vs Vaulta PDF & Study AI

The clearest difference is in-app purchases: Vaulta PDF & Study AI at none against MindStream's 1. MindStream's advantage is iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. MindStream sells 1 in-app purchase, starting at $7.99 per month. Vaulta PDF & Study AI asks for nothing beyond the download.

## The numbers

| Metric | MindStream | Vaulta PDF & Study AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Size | 24 MB | 10 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ethan Gostin](https://appshunter.io/developer/1888304532) | [THEODOR TIBERIUS STEFAN](https://appshunter.io/developer/1781964217) |

## What reviewers say

### MindStream

[App page](https://appshunter.io/ios/app/mindstream-smart-second-brain/id6766705272)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MindStream Pro | $7.99 | per month |


### Vaulta PDF & Study AI

[App page](https://appshunter.io/ios/app/vaulta-pdf-and-study-ai/id6795444240)

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

**In-app purchases:** none


## Frequently asked questions

### Is MindStream free?

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

### Is Vaulta PDF & Study AI free?

Vaulta PDF & Study AI is free to download, with no in-app purchases.

### Do MindStream or Vaulta PDF & Study AI have ads?

Neither MindStream nor Vaulta PDF & Study AI shows ads.

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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.*