# MLC Chat vs Vector Space AI

The clearest difference is review sentiment: Vector Space AI at 100% against MLC Chat's 68%. Vector Space AI also leads on update cadence (every 4 days vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MLC Chat ships an update every 2 months, Vector Space AI every 4 days. The most recent releases landed on August 19, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | MLC Chat | Vector Space AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (78 ratings)](https://appshunter.io/ios/app/mlc-chat/id6448482937/reviews)** | — |
| Number of ratings | **78** | — |
| Positive reviews | 68.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | Free | Free |
| Size | 1.7 GB | 34 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Tianqi Chen](https://appshunter.io/developer/1684828246) | [Voila Tech K.K](https://appshunter.io/developer/1769335627) |

## What reviewers say

### MLC Chat

[App page](https://appshunter.io/ios/app/mlc-chat/id6448482937)

Engage in conversations with open language models directly on your iPad or iPhone. Once a model is downloaded, all interactions occur locally, ensuring privacy and offline functionality without internet access. This app is designed for non-commercial use, allowing you to run various open-source language models on your device.

**Highlights:** Local AI model chat, Offline functionality, No internet required, Privacy-focused, Open-source project integration, Downloadable language models

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Runs fast locally
- ✅ Works offline
- 💰 Free to use
- 👍 Easy to use
- 💡 Supports various LLM models

**What reviewers complain about**

- ⚠️ Limited model selection
- 📉 High VRAM requirements
- 📱 Incompatible with older devices
- ❌ Crashes on some devices/models
- 🗄️ Cannot save conversations

**Reported bugs**

- Phi model crashes on iOS 26.0.1 17 Pro Max
- App crashes on iPad Pro 4th Gen, iPadOs 17.7
- RedPajama model crashes app on initialization
- Update is extremely slow
- Download model button disabled in new version

**Requested features**

- Ability to import custom models (from URL/Hugging Face)
- Support for more specific models (DeepSeek, Phi-2, Gemma 2B/7B, MoE Mixtral 8x7B, LLaVA)
- History of conversations
- iOS shortcuts support
- Ability to export entire responses


### 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


## Frequently asked questions

### Is MLC Chat free?

MLC Chat is free to download, with no in-app purchases.

### Is Vector Space AI free?

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

### Do MLC Chat or Vector Space AI have ads?

Neither MLC Chat nor Vector Space AI shows ads.

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

MLC Chat ships an update every 2 months, and Vector Space AI every 4 days. Most recently, MLC Chat was updated on August 19, 2026 and Vector Space AI on September 7, 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.*