# Vector Space AI vs Private AI

The clearest difference is price: Vector Space AI at Free against Private AI's $4.99. Vector Space AI also leads on iOS requirement (18.0 vs 26.0). Private AI's advantage is chart position (#195 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

Vector Space AI is free to download; Private AI costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Vector Space AI ships an update every 4 days, Private AI every 2 days. The most recent releases landed on September 7, 2026 and July 30, 2026 respectively.

## The numbers

| Metric | Vector Space AI | Private AI |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Free | — |
| Best chart rank | — | **#195** |
| Size | 34 MB | 6 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Voila Tech K.K](https://appshunter.io/developer/1769335627) | [GTechnologies LLC](https://appshunter.io/developer/1813624050) |

## What reviewers say

### Vector Space AI

[App page](https://appshunter.io/ios/app/vector-space-ai/id6746352865)

This app offers a fast, private AI companion that runs locally on your device, providing instant responses for writing, brainstorming, and coding. It also allows seamless switching to cloud-based AI for more advanced queries.

**Highlights:** Runs locally on device, Optional ChatGPT API connection, Modern and clean interface, Instant response times, Complete user data privacy, Seamless mode switching

**Features:** Safari Extension

**In-app purchases:** none


### Private AI

[App page](https://appshunter.io/ios/app/private-ai-document-chat/id6757301317)

**Currently charting:** #195 Top Paid · Productivity (US App Store)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Vector Space AI free?

Vector Space AI is free to download, with no in-app purchases.

### Is Private AI free?

Private AI costs $4.99, with no in-app purchases.

### Do Vector Space AI or Private AI have ads?

Neither Vector Space AI nor Private AI shows ads.

### Which is updated more often, Vector Space AI or Private AI?

Vector Space AI ships an update every 4 days, and Private AI every 2 days. Most recently, Vector Space AI was updated on September 7, 2026 and Private AI on July 30, 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.*