Comparison

Atomic Chat vs Lockdeo

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

Lockdeo

Features
Read full description

Lockdeo is a local video lock screen creator. Choose videos of people, pets, travel, or everyday moments from your Photos library, then crop and position them in a 3:4 lock screen layout. Create Lock Screen Videos * Choose a video from your Photos library * Drag and zoom to frame the subject in a 3:4 layout * Keep the original audio or mute the video * Preview your lock screen video before saving Manage Your Themes * Rename, edit, or delete saved themes * Keep the original video and editing settings so you can overwrite or save a copy at any time * Select a theme to play on your Lock Screen Play from the Lock Screen Add Lockdeo to your Lock Screen controls, then tap it to play the theme you’ve selected in the app. Lockdeo uses the system’s Now Playing framework to display animated artwork and automatically loops the video. The final appearance on the Lock Screen is determined by iOS. Your Privacy Comes First Lockdeo uses Apple’s system photo picker and only accesses videos you explicitly select. Your videos, themes, and editing settings stay on your device. When you delete a theme, its associated files are removed as well. Lockdeo does not upload your videos, scan your photo library, collect analytics, or access your device identifier. The free version lets you save one lock screen video. Upgrade to Lockdeo Pro with a monthly subscription or a lifetime purchase to save unlimited themes. Requires iPhone running iOS 26 or later Privacy Policy:https://foggy-bellflower-ae3.notion.site/Lockdeo-Privacy-Policy-3a51a28522d981b2846adc7a1360203d EULA:https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Atomic Chat4 screens
Lockdeo3 screens

Verdict

The call

The clearest difference is in-app purchases: Atomic Chat at none against Lockdeo's 2. Atomic Chat also leads on iOS requirement (16.2 vs 26.0). Lockdeo's advantage is update cadence (every 5 days vs fortnightly). On price, ads and device support 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. Lockdeo sells 2 in-app purchases, starting at $1.99 per month. Atomic Chat asks for nothing beyond the download.

UpkeepUpdate frequency

Atomic Chat ships an update fortnightly, Lockdeo every 5 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Atomic Chat versus Lockdeo: the parameters behind the verdict, then further details
ParameterAtomic ChatLockdeo
PriceFreeFree
Rating3.6 (12 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings12 — better—
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.2 — better26.0
Further details — not scored
Size84 MB3 MB
Age rating9+4+
DeveloperAtomic Mail世杰 戴

In-app purchases

None

Atomic Chat

No in-app purchases

2 purchases

Lockdeo

Subscriptions1
  • Monthly Subscription$1.991 Month
One-time1
  • Lifetime Subscription$3.99

Questions

Is Atomic Chat free?
Atomic Chat is free to download, with no in-app purchases.
Is Lockdeo free?
Lockdeo is free to download, with in-app purchases available.
Do Atomic Chat or Lockdeo have ads?
Neither Atomic Chat nor Lockdeo shows ads.
Which is updated more often, Atomic Chat or Lockdeo?
Atomic Chat ships an update fortnightly, and Lockdeo every 5 days. Most recently, Atomic Chat was updated on October 24, 2026 and Lockdeo on October 25, 2026.

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