# Arbiter vs ThinkMap

The clearest difference is monetization model: Arbiter at free against ThinkMap's free with in-app purchases. Arbiter also leads on ratings volume (16 vs 1). ThinkMap's advantage is iOS requirement (15.0 vs 18.4). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Arbiter sells 4 one-off in-app purchases and ThinkMap sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Arbiter against 5.0 for ThinkMap. That said, the two scores are not equally well evidenced: Arbiter has 16 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Arbiter ships an update fortnightly, ThinkMap every 3 weeks. The most recent releases landed on September 21, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Arbiter | ThinkMap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (16 ratings)](https://appshunter.io/ios/app/arbiter-local-ai-chat/id6747954532/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/thinkmap-ai-problem-solver/id6754587551/reviews)** |
| Number of ratings | **16** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 40 MB | 60 MB |
| Requires iOS | 18.4 | **15.0** |
| Devices | iPhone, Mac | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jordan Stone](https://appshunter.io/developer/1823554814) | [Rinith Binny](https://appshunter.io/developer/1565917805) |

## What reviewers say

### Arbiter

[App page](https://appshunter.io/ios/app/arbiter-local-ai-chat/id6747954532)

This privacy-focused AI assistant operates entirely on your device, offering offline functionality. Choose from various open-source models to suit your needs, with all conversations securely stored locally. It's ideal for brainstorming, proofreading, and exploring AI capabilities without data collection.

**Highlights:** On-device AI processing, Offline model execution, Document summarization, Privacy-focused design, Multiple AI model selection, Local data storage

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |
| Extra Large Tip | $19.99 | one-time |


### ThinkMap

[App page](https://appshunter.io/ios/app/thinkmap-ai-problem-solver/id6754587551)

This AI-powered app helps you solve problems and understand complex ideas through visual thinking. It generates decision trees and mind maps to break down dilemmas, analyze topics, and plan projects. Turn confusion into clarity with structured AI logic and interactive visual tools.

**Highlights:** AI-powered problem-solving, Decision tree generator, Mind map creator, Visual thinking tools, Interactive maps, Offline access

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Pass | $1.99 | per month |


## Frequently asked questions

### Is Arbiter free?

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

### Is ThinkMap free?

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

### Which has better reviews, Arbiter or ThinkMap?

ThinkMap is rated higher. Arbiter averages 4.9 out of 5 from 16 ratings, while ThinkMap averages 5.0 from 1 ratings.

### Do Arbiter or ThinkMap have ads?

Neither Arbiter nor ThinkMap shows ads.

### Which is updated more often, Arbiter or ThinkMap?

Arbiter ships an update fortnightly, and ThinkMap every 3 weeks. Most recently, Arbiter was updated on September 21, 2026 and ThinkMap on June 10, 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.*