Comparison

Atomic Chat vs AstralDeep

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

Head to head
About

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.

Highlights
  • 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
Read full description

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.

About

AstralDeep

Features
Read full description

AstralDeep gives you a team of specialist AI agents that work on your behalf — they research live sources, read your files, and keep working on your AstralDeep server after you close the app. And you can hold them to account: every tool is permission-gated, every action lands in a tamper-evident audit log, and nothing the platform builds for itself runs without your approval. AGENTS THAT ACT FOR YOU • Specialists collaborate on each request — live web research with citation-backed briefs (it never fabricates a source), summarization, weather, ML forecasting and classification, connectors, a general assistant — running multiple tools in parallel. • Hand them files in chat and they read them directly. • They remember what matters across conversations and personalize to you over time. IT KEEPS WORKING WHEN YOU DON'T • Schedule work and close the app — jobs run on your server; results are waiting in your workspace when you return. • Upload a file format it can't read yet and the platform drafts its own parser agent, self-tests it against your actual file, and submits it for administrator approval — once approved, it goes live and finishes your original request. • Ask for something no agent covers, and AstralDeep can generate a brand-new agent — security-gated, self-tested, and never run for real without explicit human approval. SECURITY YOU CAN VERIFY Delegation only works if you stay in control — and self-extension is only safe on a platform built to be inspected: • Per-tool permissions: grant and revoke access tool by tool, for every agent. Deny is the default — agents cannot touch what you haven't granted. • Tamper-evident audit: every tool call lands in a cryptographically hash-chained log you can check for tampering — see exactly what your agents did, and when. • End-to-end-encrypted credentials: service credentials you store can be decrypted only by the specific agent that needs them — the server itself never holds them in plaintext. • Attenuated authority: agents act with cryptographically scoped tokens carrying only the authority you delegated — narrower at every hop, never wider. • Sensitive-data guardrails screen text before it reaches outside services, agent network egress is gated, and every safety feature fails closed. LIVE ANSWERS, NOT WALLS OF TEXT Answers arrive as live components — dashboards, charts, tables, timelines — on a per-conversation canvas. Follow-ups update them in place, an adaptive designer arranges multi-part answers, and History steps back through earlier states. ON APPLE WATCH Sign in with a QR code (no typing), ask by voice, hear answers spoken aloud — plus glanceable cards and recent conversations. AstralDeep requires an account on an AstralDeep server; the app signs in through your organization's single sign-on.

Screenshots

Atomic Chat4 screens
AstralDeep3 screens

Verdict

The call

The clearest difference is device support: AstralDeep at 4 against Atomic Chat's 2. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Atomic Chat ships an update fortnightly, AstralDeep every 11 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 9 level
Atomic Chat versus AstralDeep: the parameters behind the verdict, then further details
ParameterAtomic ChatAstralDeep
PriceFreeFree
Rating3.6 (12 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings12 — better—
Update frequencyFortnightlyEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, Mac, Apple Watch — better
Requires iOS16.2 — better17.0
Further details — not scored
Size84 MB39 MB
Age rating9+9+
DeveloperAtomic MailPersonalized AI Labs LLC

In-app purchases

None

Atomic Chat

No in-app purchases

None

AstralDeep

No in-app purchases

Questions

Is Atomic Chat free?
Atomic Chat is free to download, with no in-app purchases.
Is AstralDeep free?
AstralDeep is free to download, with no in-app purchases.
Do Atomic Chat or AstralDeep have ads?
Neither Atomic Chat nor AstralDeep shows ads.
Which is updated more often, Atomic Chat or AstralDeep?
Atomic Chat ships an update fortnightly, and AstralDeep every 11 days. Most recently, Atomic Chat was updated on October 24, 2026 and AstralDeep on October 6, 2026.

Other comparisons