# Vector Space AI vs VocaSubtitle

The clearest difference is in-app purchases: Vector Space AI at none against VocaSubtitle's 2. Vector Space AI also leads on update cadence (every 4 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. VocaSubtitle sells 2 in-app purchases, starting at $14.99 per year. Vector Space AI asks for nothing beyond the download.

Vector Space AI ships an update every 4 days, VocaSubtitle every 6 weeks. The most recent releases landed on October 8, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Vector Space AI | VocaSubtitle |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 weeks |
| Monetization | Free | — |
| Size | 34 MB | 6 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Voila Tech K.K](https://appshunter.io/developer/1769335627) | [红蓉 李](https://appshunter.io/developer/1819224569) |

## 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


### VocaSubtitle

[App page](https://appshunter.io/ios/app/vocasubtitle/id6754972822)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Membership | $14.99 | per year |
| Lifetime Membership | $39.99 | one-time |


## Frequently asked questions

### Is Vector Space AI free?

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

### Is VocaSubtitle free?

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

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

Neither Vector Space AI nor VocaSubtitle shows ads.

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

Vector Space AI ships an update every 4 days, and VocaSubtitle every 6 weeks. Most recently, Vector Space AI was updated on October 8, 2026 and VocaSubtitle on October 3, 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.*