Comparison

Chatmark vs OneThing

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

Head to head
About

Chatmark

Features
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Chatmark gives you a simple way to: - Organize conversations from multiple AI apps Key Features - Save chats from AI apps instantly via Share Sheet - Import ChatGPT shared links with structured parsing - Clean, readable conversations (user / AI separation) - Markdown support for better readability - Local storage (your data stays on your device) Privacy First - Chatmark stores everything locally on your device. No accounts. No cloud. No tracking.

About

OneThing

Features
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One Thing is the anti-to-do app. Instead of a list that only grows, One Thing asks a single question each morning: what's the one thing that would make today feel meaningful? You choose it. You focus. Everything else can wait. No endless lists. No priority juggling. No guilt from yesterday. Just one thing at a time. WHY ONE THING Long to-do lists don't make you productive — they make you anxious. Focusing on a single, intentional task each day is calmer, kinder, and it's how real progress actually happens. One Thing is built for anyone who needs to focus — especially people navigating ADHD or burnout recovery. FOCUS, GENTLY • Set one task a day — that's the whole app • A built-in focus timer that keeps perfect time even in the background • Calming ambient sounds — brown noise, pink noise, rain and waves • A Live Activity keeps your timer on the Lock Screen and Dynamic Island STREAKS THAT FORGIVE • Build momentum one focused day at a time • Streak Freeze quietly protects your streak when life happens — one off day won't erase weeks of progress • A beautiful consistency calendar of every day you showed up DAILY MOTIVATION • 690 hand-crafted lines of encouragement • A fresh one every morning — in the app and your notification • It never repeats MADE TO FEEL GOOD • Reflect on how it went and capture a mood • Plan tomorrow's one thing tonight • Eight calm themes to match your mood • Home & Lock Screen widgets, an Apple Watch app, and Siri Shortcuts • Full Dynamic Type support for comfortable reading PRIVATE BY DESIGN • No accounts. No ads. No tracking. • Your tasks and reflections stay on your device and sync through your own iCloud • We don't run servers and we can't see your data One Thing is free. If it helps you, a small tip unlocks all premium themes and supports development.

Screenshots

Chatmark4 screens
OneThing4 screens

Verdict

The call

The clearest difference is iOS requirement: Chatmark at 16 against OneThing's 26.2. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

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

Scorecard1 real difference Ā· 5 level
Chatmark versus OneThing: the parameters behind the verdict, then further details
ParameterChatmarkOneThing
PriceFreeFree
Update frequencyEvery 6 weeks—
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad
Requires iOS16 — better26.2
Further details — not scored
Size27 MB3 MB
Age rating4+4+
DeveloperTaeeun KimCozy Suites Realty LLC

In-app purchases

None

Chatmark

No in-app purchases

None

OneThing

No in-app purchases

Questions

Is Chatmark free?
Chatmark is free to download, with no in-app purchases.
Is OneThing free?
OneThing is free to download, with no in-app purchases.
Do Chatmark or OneThing have ads?
Neither Chatmark nor OneThing shows ads.

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