# Vector Space AI vs PrompX

The clearest difference is rating: PrompX at 5.0 against Vector Space AI's 4.0. Vector Space AI's advantage is in-app purchases (none vs 2). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Both are free to download. PrompX sells 2 in-app purchases, starting at $2.99 per month. Vector Space AI asks for nothing beyond the download.

PrompX holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Vector Space AI ships an update every 4 days, PrompX every 3 days. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Vector Space AI | PrompX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/vector-space-ai/id6746352865/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/prompx/id6762642267/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 34 MB | 29 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Voila Tech K.K](https://appshunter.io/developer/1769335627) | [Nexurift LLC](https://appshunter.io/developer/1894925664) |

## 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


### PrompX

[App page](https://appshunter.io/ios/app/prompx/id6762642267)

This app helps you save, organize, and share AI prompts. Upgrade to Pro for unlimited features, including version history and password-protected sharing.

**Highlights:** Save AI prompts, Organize prompts, Share prompts, Unlimited prompts (Pro), Full version history (Pro), Password-protected sharing (Pro)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PrompX Pro Monthly | $2.99 | per month |
| PrompX Pro Yearly | $24.99 | per year |


## Frequently asked questions

### Is Vector Space AI free?

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

### Is PrompX free?

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

### Which has better reviews, Vector Space AI or PrompX?

PrompX is rated higher. Vector Space AI averages 4.0 out of 5 from 1 ratings, while PrompX averages 5.0 from 2 ratings.

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

Neither Vector Space AI nor PrompX shows ads.

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

Vector Space AI ships an update every 4 days, and PrompX every 3 days. Most recently, Vector Space AI was updated on October 24, 2026 and PrompX on October 21, 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.*