Comparison

Ai2 OLMoE vs Echo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ai2 OLMoE

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
Read full description

Our app is intended to help researchers better explore how to make on-device intelligence better and to enable developers to quickly prototype new AI experiences – all with no cloud connectivity required. The Ai2 OLMoE app can be used to: * Experience which real-world tasks state-of-the-art local models are capable of * Research how to improve small AI models * Test your own models locally using our open-source codebase * Integrate OLMoE into other iOS applications Best of all, interactions with OLMoE are fully private. Unless you decide to share a conversation, your conversations never leave your device. Features: * Efficiency: OLMoE is a highly efficient mixture-of-experts version of the Ai2 OLMo family of models * Performance: OLMoE is trained with the fully open, state-of-the-art Tülu 3 recipe * Privacy: The Ai2 OLMoE app provides privacy and security by operating completely on-device * Shareable: Easily share the output of your conversations with friends or colleagues * Truly open: The OLMoE model and the application code are fully open-source OLMoE is proudly offered by Ai2 as a powerful research tool to help the community better understand how LLMs are created and how they operate. When interacting with OMLoE, always use your best judgment, fact-check important information, and consider the context when interpreting content generated in this app. Open source code repository available at: https://github.com/allenai/OLMoE.swift Terms of service: https://allenai.org/terms/2024-09-25 Privacy policy: https://allenai.org/privacy-policy/2022-07-21

About

Echo

Features
Read full description

Experience the power of artificial intelligence on your own terms. Our app lets you download and run open-source AI models directly on your phone—no internet connection required. You stay in full control of your data and privacy at all times. With support for offline AI, private LLM, and local LLM functionality, you can explore advanced AI features anywhere, anytime—completely private AI with no cloud involvement. Key Features Fully Offline: No internet needed. Run AI models right on your device for ultimate privacy and convenience. Open-Source Models: Choose from a variety of open-source models to tailor your AI experience to your specific needs. Data Stays Yours: All processing happens locally, keeping your personal information safe and secure on your phone. Easy to Use: Download, install, and run models with just a few taps—no technical expertise required. Expandable & Customizable: Add or swap models to keep up with the latest AI innovations and never miss out on new features. Unlock the future of AI—on your phone, on your terms. Download now to enjoy a private LLM experience wherever you go!

Screenshots

Ai2 OLMoE4 screens
Echo4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
Ai2 OLMoE versus Echo: the parameters behind the verdict, then further details
ParameterAi2 OLMoEEcho
PriceFree — better$6.99
Rating4.8 (17 ratings) — better—
Positive reviews77.8% of reviews—
Number of ratings17 — better—
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS17.5 — better17.6
Further details — not scored
Size7 MB16 MB
Age rating17+4+
DeveloperTHE ALLEN INSTITUTE FOR ARTIFICIAL INTELLIGENCEUmi Indigo LLC

In-app purchases

None

Ai2 OLMoE

No in-app purchases

None

Echo

No in-app purchases

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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