Atomic Chat vs MausBot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Atomic Chat
This AI assistant runs entirely on your device, offering complete privacy and offline functionality. It allows you to ask questions, brainstorm ideas, draft content, and more without needing an internet connection or an account.
- 100% on-device AI processing
- Complete privacy, no cloud servers
- Offline functionality
- No account or sign-up required
- Choose from curated language models
- Optimized for Apple Silicon
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Atomic Chat is a private AI assistant that runs entirely on your iPhone or iPad. No accounts, no sign-ups, no cloud servers. Every conversation stays on your device. WHY ATOMIC CHAT - 100% on-device AI — models run locally using your device's Neural Engine - Complete privacy — your chats never leave your iPhone - Works offline — no internet required after initial model download - No account needed — open the app and start chatting - Free to use — no subscriptions, no hidden fees WHAT YOU CAN DO - Ask questions and get instant answers - Brainstorm ideas and get creative suggestions - Draft emails, messages, and documents - Summarize text and extract key points - Translate between languages - Get help with writing, coding, and learning - Have natural, flowing conversations on any topic CHOOSE YOUR MODEL Pick from a curated selection of open-source language models optimized for mobile. Download once, use forever. Swap models anytime based on your needs — smaller models for speed, larger models for depth. BUILT FOR PRIVACY Atomic Chat processes everything locally on your device. Your prompts, your conversations, and your data never touch a server. There is no telemetry, no analytics tracking your conversations, and no third-party AI providers. OPTIMIZED FOR APPLE SILICON Atomic Chat is built to take full advantage of modern iPhone and iPad hardware, delivering fast response times and efficient battery usage through Apple's Neural Engine. PERFECT FOR - Privacy-conscious users who don't want their conversations in the cloud - Travelers and commuters who need AI without internet - Professionals handling sensitive information - Anyone curious about running AI on their own device Atomic Chat puts the power of modern AI in your pocket — without the compromises of cloud services. Download, pick a model, and start chatting. Your data is yours.
MausBot
Delegate tasks to AI agents that operate on your personal computer, accessible from your phone. Manage workflows like inbox triage, code reviews, and research, with bots requiring your approval before acting. Communicate with bots via text or voice, and run multiple agents in parallel for complex projects.
- AI agent task delegation
- Personal computer operation
- Inbox triage and email management
- Code review and bug reproduction
- Voice and text communication with bots
- Parallel bot execution
- OAuth integrations with popular services
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Hand real work to AI agents that run on your own computer, and carry them in your pocket. MausBot is the iPhone app for OpenMausBot, the open-source agent runtime you install on your own Mac, Windows or Linux machine. Your bots work on your hardware, with your keys, on your files. Nothing is uploaded to us. WORK YOU CAN HAND OFF · Inbox triage: read the morning's mail, flag what matters, draft replies, send nothing without your yes · Pull request review: read a diff, leave comments, open the follow-up issue · Bug reproduction: drive a browser until the bug happens, then write it up with the steps · Standup digest: gather what moved yesterday and post the summary to Slack · Issue grooming: tidy a Linear backlog, label it, close what already shipped · Research watch: check a list of sites overnight and report what changed · Portal errands: log into the dull vendor site, download the invoices, park them for review · Codebase chores: run the migration, fix the lint, open the branch MESSAGE A BOT LIKE A TEAMMATE Send work from your phone the way you would text a colleague. Pick up the same thread on your computer. Each bot keeps its own model, its own computer and its own instructions, and comes back to you only when it needs a decision. A BOT ASKS BEFORE IT ACTS Shell commands, file edits and open questions arrive as cards you answer with one tap, from the lock screen if you like. Nothing risky happens while you are away without your approval. The gate is the point. TALK TO IT OUT LOUD Start a Live call and brief a bot by voice while you walk, with the chat open beside you. MANY BOTS, IN PARALLEL Run a bot per job. One owns a project, one watches the inbox, one keeps the build green. Put several in a channel and they pass work between themselves. A cross-bot inbox shows everything waiting on you in one place. IT KEEPS GOING WITHOUT YOU Routines run work on a schedule, from every few minutes to selected weekdays. Webhooks let another system start a job. Your computer does the work whether or not your phone is awake. CONNECTED APPS OAuth once and every bot can use Gmail, Slack, GitHub, Notion, Linear and hundreds more as tools. BRING YOUR OWN BRAIN Bots run on the Claude, Codex and Grok CLIs already installed on your machine. Switch a bot's model mid-conversation. PRIVATE BY ARCHITECTURE MausBot talks straight to the companion service on your own computer. Transcripts and keys stay in local storage on that machine. Pair with a short-lived code from Remote access, and revoke the phone whenever you want. AT HOME OR AWAY On a trusted network the phone finds your computer by itself. For remote access, install Tailscale on both and connect by MagicDNS name. Requires OpenMausBot on a Mac, Windows or Linux computer. Free and open source. Tailscale is optional and is not affiliated with OpenMausBot.
Screenshots
Verdict
Atomic Chat and MausBot both sit at 3.6 stars, but that hides the real split: 80% of Atomic Chat's written reviews are positive against 50% of MausBot's. Atomic Chat also leads on ratings volume (12 vs 4). MausBot's advantage is update cadence (every 2 days vs fortnightly). On price, rating, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 3.6 for Atomic Chat against 3.5 for MausBot. Both are backed by a comparable volume of ratings — 12 and 4 respectively. Written reviews are what separate them: 80% of Atomic Chat's written reviews are positive against 50% of MausBot's.
Atomic Chat ships an update fortnightly, MausBot every 2 days. Both last shipped on October 24, 2026.
| Parameter | Atomic Chat | MausBot |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (12 ratings) — better | 3.5 (4 ratings) |
| Positive reviews | 80.0% of reviews — better | 50.0% of reviews |
| Number of ratings | 12 — better | 4 |
| Update frequency | Fortnightly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.2 | 16.0 — better |
| Further details — not scored | ||
| Size | 84 MB | 29 MB |
| Age rating | 9+ | 4+ |
| Developer | Atomic Mail | Supamaus Software Private Limited |
Customer experience
Atomic Chat
MausBot
In-app purchases
Atomic Chat
No in-app purchases
MausBot
No in-app purchases









