Comparison

Petatto TODO vs Second Brain

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

Head to head
About

Petatto TODO

Features
Read full description

Tired of complicated task managers and productivity systems? Petatto TODO is a simple to-do list app inspired by sticky notes. Just write down what you want to do and place it on your board. No pressure. No complicated setup. Just a gentle way to keep track of your tasks. Designed for people who want to stay organized without feeling overwhelmed. FEATURES • Sticky note style task cards • Drag and drop sorting • Mood-based labels • Fast and simple search • Smooth animations • Cute pastel design • Clean and distraction-free interface PERFECT FOR • Daily tasks • Personal reminders • Study plans • Shopping lists • Work notes • Small habits and routines FOR PEOPLE WHO • Have tried many to-do apps without success • Feel stressed by complicated productivity tools • Prefer simple task management • Love cute and minimal design • Want a calmer way to stay organized Petatto TODO isn't about maximizing productivity. It's about helping you take the next small step. A simple, gentle, and friendly place for your tasks.

About

Second Brain

Features
Read full description

Manage notes, to-dos, and your schedule in one app. Capture thoughts as notes, actions as to-dos, and anything with a date on the calendar. No more hopping between apps. ā–  Notes Write fast, organize later. Sort into folders and find anything with search. Share only the notes you choose via a link, and unshare with a single tap. ā–  To-Dos Set due dates and repeat rules. See what's left with D-Day countdowns, and group tasks by category. ā–  Calendar See to-dos and events on the same screen. Switch between month and week views to check how full your week is. ā–  Widgets Check today's tasks from your Home Screen and Lock Screen. See what's left without opening the app. ā–  Notifications Get notified as deadlines approach. Start the day with a morning briefing and wrap up with a daily summary. ā–  AI Organize Pull action items out of long text. Turn copied text into to-dos. Gather past records into a retrospective. AI features are free up to 3 times per month. To use more, connect your own AI API key. ā–  Same content on every device Notes written on iPhone open on the web too. Sign in once and your content follows you across devices. ā–  Privacy AI features only process text you explicitly send. See the privacy policy for details. https://docs.ainote.dev/legal/privacy

Screenshots

Petatto TODO4 screens
Second Brain4 screens

Verdict

The call

The clearest difference is update cadence: Second Brain at every 2 days against Petatto TODO's every 8 days. Petatto TODO's advantage is iOS requirement (15.1 vs 26.0). 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.

UpkeepUpdate frequency

Petatto TODO ships an update every 8 days, Second Brain every 2 days. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

Scorecard2 real differences Ā· 4 level
Petatto TODO versus Second Brain: the parameters behind the verdict, then further details
ParameterPetatto TODOSecond Brain
PriceFreeFree
Update frequencyEvery 8 daysEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better26.0
Further details — not scored
Size84 MB26 MB
Age rating4+4+
DeveloperMARIE MORIKAGEkim dahye

In-app purchases

None

Petatto TODO

No in-app purchases

None

Second Brain

No in-app purchases

Questions

Is Petatto TODO free?
Petatto TODO is free to download, with no in-app purchases.
Is Second Brain free?
Second Brain is free to download, with no in-app purchases.
Do Petatto TODO or Second Brain have ads?
Neither Petatto TODO nor Second Brain shows ads.
Which is updated more often, Petatto TODO or Second Brain?
Petatto TODO ships an update every 8 days, and Second Brain every 2 days. Most recently, Petatto TODO was updated on October 6, 2026 and Second Brain on October 10, 2026.

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