Comparison

Pi Epsilon vs MLX

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

Head to head
About

Pi Epsilon

A decentralized, anonymous, and end-to-end encrypted communication platform offering voice, text, video, and group calls. It provides robust security features and full user control over the server environment, bypassing third-party providers.

Highlights
  • Decentralized and anonymous communication
  • End-to-end encryption
  • Voice, text, and video calls
  • Group video conferencing
  • User-controlled server hosting
  • Decoy obfuscation tools
Features
Read full description

The Pi Epsilon (Π Ε) Communication Platform is a cutting edge decentralized, anonymous, end-to-end encrypted communication platform that includes voice, text, video, chat, and group video conference calls through a proprietary configuration that bypasses the usage of any third-party provider platforms. The Π Ε communication platform can reside on a dedicated obfuscated Virtual Private Server (VPS) or anywhere, resident to the customer’s location. The Π Ε Communication Platform offers one of the most protective cyber design decoy obfuscation tools from any nefarious attacker looking to obtain information of the real Π Ε communication platform. Look no further for your secure communication needs. Advantages • Decentralized, anonymous, real-time communication, end to end encryption protocol. • Customer has full control and oversite of the communication platform server. • Π Ε can reside on a dedicated Virtual Private Server, private rack server, or a physical server resident within the customer location. • No dependencies of any third-party provider and or backbone infrastructure. • Π Ε resides on a virtual dissimulated encrypted server (VDES), as a decoy obfuscation tool environment, shielding the real IP from any nefarious inquiries. • Π Ε includes voice, text, video, chat, and group video conference. • Supports the federate infrastructure, where multiple instances of Π Ε servers can communicate with each other. • Customer retains Admin console control to manage users, permissions, and resources.

About

MLX

This AI studio runs entirely on your device, processing conversations, voice recordings, and generated images locally. It offers hands-free calling, voice cloning, and image generation without any account creation, subscriptions, or tracking.

Highlights
  • On-device AI processing
  • Hands-free voice calls
  • Personalized voice cloning
  • Text-to-image generation
  • Offline model functionality
  • No account or tracking
Features
Read full description

MLX-Serve is a private AI studio that runs entirely on your iPhone. Every conversation, voice recording, and generated image is processed on-device by open-weight models — nothing you type, say, or create ever leaves your phone. There is no account to create, no subscription, and no tracking of any kind. MUSIC Generate songs locally using your device ! You can also play it back in the background and use MLX-Serve as a player for your generated music on the go. CHAT Talk with capable open language models (Google Gemma 4) right on your device. Ask questions, brainstorm, draft messages, get things explained. Some models can even understand photos you attach. CALL Tap Call inside any conversation to talk to the AI hands-free, like a phone call. Your speech is transcribed on-device and the reply is read back aloud. Speaker and handset modes are both supported, and the transcript is saved to your chat. VOICE CLONE Record about eight seconds of your voice and have the AI speak text in your own voice, using an on-device text-to-speech model. Great for narration and fun. IMAGES Generate images from a text prompt with an on-device diffusion model (FLUX.2). Tap a result to zoom in, save it to your photo library, or share it. FULLY PRIVATE, FULLY OFFLINE - Runs 100% on-device using Apple MLX and the Metal GPU. - No account, no analytics, no ads, no tracking. - The network is used only to download the AI models you choose from Hugging Face. After a model is downloaded, that feature works offline. REQUIREMENTS Models are multi-gigabyte downloads and on-device AI is demanding, so MLX Chat requires a recent, high-performance iPhone. Download over Wi-Fi is recommended. You pick which models to download and can delete them anytime to reclaim space. Open models are provided under their respective licenses (Gemma, Apache 2.0). MLX Chat is an independent app and is not affiliated with Google or Apple.

Screenshots

Pi Epsilon4 screens
MLX4 screens

Verdict

The call

The clearest difference is in-app purchases: Pi Epsilon at none against MLX's 1. Pi Epsilon also leads on iOS requirement (15.0 vs 26.2). MLX's advantage is update cadence (monthly vs every 6 months). On price, rating, ratings volume and ads 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

Both are free to download. MLX sells 1 one-off in-app purchase. Pi Epsilon asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Pi Epsilon against 5.0 for MLX. Both are backed by a comparable volume of ratings — 4 and 7 respectively.

UpkeepUpdate frequency

Pi Epsilon ships an update every 6 months, MLX monthly. The most recent releases landed on September 17, 2026 and September 23, 2026 respectively.

Scorecard3 real differences · 7 level
Pi Epsilon versus MLX: the parameters behind the verdict, then further details
ParameterPi EpsilonMLX
PriceFreeFree
Rating5.0 (4 ratings)5.0 (7 ratings)
Positive reviews100.0% of reviews
Number of ratings47 — better
Update frequencyEvery 6 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better26.2
Further details — not scored
Size147 MB200 MB
Age rating4+12+
DeveloperChesapeake International Consulting, LLCDavid Dalcu

Customer experience

Pi Epsilon

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

MLX

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Pi Epsilon

No in-app purchases

1 purchases

MLX

One-time1
  • Music Generation$4.99

Questions

Is Pi Epsilon free?
Pi Epsilon is free to download, with no in-app purchases.
Is MLX free?
MLX is free to download, with in-app purchases available.
Which has better reviews, Pi Epsilon or MLX?
Pi Epsilon and MLX are both rated 5.0 out of 5 on the App Store, from 4 and 7 ratings respectively.
Do Pi Epsilon or MLX have ads?
Neither Pi Epsilon nor MLX shows ads.
Which is updated more often, Pi Epsilon or MLX?
Pi Epsilon ships an update every 6 months, and MLX monthly. Most recently, Pi Epsilon was updated on September 17, 2026 and MLX on September 23, 2026.

Other comparisons