# Ai2 OLMoE vs Echo

The clearest difference is price: Ai2 OLMoE at Free against Echo's $6.99. Echo's advantage is update cadence (every 5 days vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Ai2 OLMoE is free to download; Echo costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Ai2 OLMoE ships an update every 2 months, Echo every 5 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Ai2 OLMoE | Echo |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| Rating | **[4.8 (17 ratings)](https://appshunter.io/ios/app/ai2-olmoe/id6738533815/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 7 MB | 16 MB |
| Requires iOS | **17.5** | 17.6 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [THE ALLEN INSTITUTE FOR ARTIFICIAL INTELLIGENCE](https://appshunter.io/developer/1781129223) | [Umi Indigo LLC](https://appshunter.io/developer/1679236790) |

## What reviewers say

### Ai2 OLMoE

[App page](https://appshunter.io/ios/app/ai2-olmoe/id6738533815)

Explore and improve on-device AI models with this open-source tool. It allows developers to prototype AI experiences locally without cloud connectivity, ensuring complete user privacy. Researchers can test and integrate models directly on their devices.

**Highlights:** On-device AI model exploration, Prototype AI experiences locally, Open-source codebase, No cloud connectivity required, Fully private interactions, Shareable conversation output

**In-app purchases:** none


### Echo

[App page](https://appshunter.io/ios/app/echo-ai/id6741455864)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ai2 OLMoE free?

Ai2 OLMoE is free to download, with no in-app purchases.

### Is Echo free?

Echo costs $6.99, with no in-app purchases.

### Do Ai2 OLMoE or Echo have ads?

Neither Ai2 OLMoE nor Echo shows ads.

### Which is updated more often, Ai2 OLMoE or Echo?

Ai2 OLMoE ships an update every 2 months, and Echo every 5 days. Most recently, Ai2 OLMoE was updated on October 23, 2026 and Echo on October 25, 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.*