Comparison

Chain vs Second Brain

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

Head to head
About

Chain

This app helps you build positive habits and break negative ones through a visual tracking system. Set goals, monitor daily progress, and receive reminders to stay on track. Customize your experience with themes and gain insights into your long-term progress.

Highlights
  • Build unbreakable habit chains
  • Daily progress tracking with calendar view
  • Set and achieve personal goals
  • Routine loop for habit acquisition
  • Customizable reminders
  • Motivational quotes and insights
  • User-friendly interface with themes
Features
Read full description

Take control of your habits and on a transformative journey with Chain, the ultimate daily habit tracker! In the hustle and bustle of modern life, cultivating positive habits can be the key to unlocking your full potential. Whether you're determined to break free from unhealthy addictions, establish positive routines, or simply keep a vigilant eye on your progress. Chain is your unwavering companion on the path to self-improvement. Key Features: Build Unbreakable Chains Create daily habits and watch your success unfold. The chain is your visual representation of commitment. Don't break it, and witness the power of consistency. Daily Progress Tracking Effortlessly monitor your daily achievements. The sleek calendar allows you to mark each successful day, providing a clear overview of your commitment and dedication. Set Personal Goals Define your goals, big or small, and let the chain guide you toward achieving them. Break down larger objectives into manageable daily tasks, making success more achievable. Routine Loop Create a routine cycle without breaking your chains using the Don't Break the Chain method. Stick to this cycle and get rid of your addictions as well as easily acquire new habits! Custom Reminders Set personalized reminders to stay on track. Our app will gently prompt you at the perfect times, ensuring you never miss a chance to build your habit. Stay Motivated Receive motivational reminders and quotes to keep you inspired on your journey. Overcome challenges, build resilience, and celebrate your victories with the chain's positive reinforcement. Insights and Analytics Track your long-term progress with detailed insights and analytics. Understand your habits, identify patterns, and optimize your routine for even greater success. User-Friendly Interface Navigate effortlessly through a user-friendly interface designed for simplicity and efficiency. Track your journey, celebrate milestones, and make habit-building an enjoyable experience. Customization with Different Themes You can customize the chain you create with different themes and color options. By choosing a theme according to your taste, you will beautify your chain and continue to gain habits without breaking it. Subscription Knowladge "Chain" subscription Pro Access . "Chain" subscription plans: Monthly: $1.99 Annual: $12.99 Payments and Renewal: Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. You can manage or turn off auto-renew in your Account settings at any time after purchase No cancellation of the current subscription is allowed during the active period. Terms of Use(EULA): https://chain-terms-of-use.blogspot.com/2024/07/chain-terms-of-use.html Privacy policy: https://sites.google.com/view/chain-privacy-policy/ana-sayfa?pli=1

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. β–  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. β–  To-Dos Set due dates and repeat rules. See what's left with D-Day countdowns, and group tasks by category. β–  Calendar See to-dos and events on the same screen. Switch between month and week views to check how full your week is. β–  Widgets Check today's tasks from your Home Screen and Lock Screen. See what's left without opening the app. β–  Notifications Get notified as deadlines approach. Start the day with a morning briefing and wrap up with a daily summary. β–  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. β–  Same content on every device Notes written on iPhone open on the web too. Sign in once and your content follows you across devices. β–  Privacy AI features only process text you explicitly send. See the privacy policy for details. https://docs.ainote.dev/legal/privacy

Screenshots

Chain4 screens
Second Brain4 screens

Verdict

The call

The clearest difference is in-app purchases: Second Brain at none against Chain's 3. Second Brain also leads on update cadence (every 2 days vs weekly). Chain's advantage is iOS requirement (15.0 vs 26.0). On price, ads and device support there is nothing between them.

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

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

Both are free to download. Chain sells 3 in-app purchases, starting at $2.99 per month. Second Brain asks for nothing beyond the download.

UpkeepUpdate frequency

Chain ships an update weekly, Second Brain every 2 days. The most recent releases landed on October 21, 2026 and October 10, 2026 respectively.

Scorecard3 real differences Β· 5 level
Chain versus Second Brain: the parameters behind the verdict, then further details
ParameterChainSecond Brain
PriceFreeFree
Positive reviews90.0% of reviewsβ€”
Update frequencyWeeklyEvery 2 days β€” better
AdsNoNo
In-app purchasesYesNo β€” better
MonetizationFreemiumβ€”
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.0 β€” better26.0
Further details β€” not scored
Size21 MB26 MB
Age rating4+4+
DeveloperMuhammed Talha POLATkim dahye

In-app purchases

3 purchases

Chain

Subscriptions2
  • Chain Pro Access - Monthly$2.991 Month
  • Chain Pro Access - Annual$12.991 Year
One-time1
  • Chain Pro Access Lifetime$24.99
None

Second Brain

No in-app purchases

Questions

Is Chain free?
Chain is free to download, with in-app purchases available.
Is Second Brain free?
Second Brain is free to download, with no in-app purchases.
Do Chain or Second Brain have ads?
Neither Chain nor Second Brain shows ads.
Which is updated more often, Chain or Second Brain?
Chain ships an update weekly, and Second Brain every 2 days. Most recently, Chain was updated on October 21, 2026 and Second Brain on October 10, 2026.

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