Comparison

IDoList 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

IDoList

Features
Read full description

A simple to-do app that adapts to your energy. IDoList helps you focus on what matters, finish tasks without stress, and feel accomplished every day. • Sort tasks by energy, priority, or deadline • Start focus sprints to get more done • Keep everything organized in one place • Simple, clean design — no clutter, no distractions Stay motivated, reduce overwhelm, and finally take control of your day. Privacy Policy: https://www.notion.so/IDoList-Privacy-Policy-25123916044e80b99868ece8bb578b1c Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Second Brain

This AI-powered journal captures your thoughts via voice or text, automatically organizing and connecting them. It helps you recall memories, discover patterns, and reflect on your growth.

Highlights
  • AI classification, tagging, and summarization
  • Semantic search by meaning
  • Three-layer memory system
  • People cards for relationship tracking
  • Weekly AI reflections
  • Voice input with transcription
  • Data export (JSON + Markdown)
Features
Read full description

Most notes get written once and never read again. Second Brain reads them for you. Write a line whenever something is on your mind, and once a week it tells you what your week was really about. You don't need to keep a diary or a streak. One line a day is enough. YOUR WEEK, READ BACK TO YOU The weekly insight covers what took up your attention, what changed since last week, and one concrete thing to try. Every insight shows the notes it came from, so you can check it against what you actually wrote. Your first weekly insight is free. Once a month you get a longer read on where the month went. After your first five notes there's also a first impression of you, and it fills in as you keep writing. CAPTURE Type, or press and hold to speak. Share text, links or images from other apps, or pick screenshots and the text in them is read on your phone. Each note gets a title and tags automatically, so there's nothing to file. ASK YOUR PAST Explore searches by meaning, not only keywords. Ask "What did I decide about the move?" or "What did Anna say last time?" and get an answer built from your own notes. PEOPLE Keep a card for the people in your life: what they said, what you did together, what to bring up next time. Before you meet someone, a reminder shows your open to-dos and what you talked about last time. REMINDERS AND WIDGETS Write "dentist next Friday at 3pm" and it becomes a reminder and a checklist item. There are widgets for the Home Screen and Lock Screen, and the checklist can run as a Live Activity. PRIVACY Your notes are stored on your device. There's no account to create and no server of mine in between. To title, tag and reflect on your notes, their text is sent to a cloud AI service. If your iPhone supports Apple Intelligence, you can turn on On-Device AI and new notes are handled on the phone instead; Explore and reflections still use the cloud. Every AI result is labeled "On device" or "Cloud AI", so you can see which is which. iCloud sync is optional and uses your own iCloud account. You can export everything as JSON or Markdown at any time, for free. FREE AND PRO Free: 5 notes a day, daily reflections, your first weekly insight, and export. Pro: unlimited notes, weekly insights and monthly reads, 20 Explore questions a day, up to 30 screenshot imports a day, unlimited people, the memory graph and life themes, iCloud sync, and the Rainbow Aurora theme. Pro is a monthly or yearly subscription. The yearly plan comes with a 7-day free trial, the monthly plan with 3 days. Payment is charged to your Apple ID and renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel it in your App Store account settings. Second Brain is made by one person, Lemon. Terms of Use: https://smartkiitos.com/secondbrain/terms/ Privacy Policy: https://smartkiitos.com/secondbrain/privacy/

Screenshots

IDoList4 screens
Second Brain4 screens

Verdict

The call

The clearest difference is update cadence: Second Brain at every 9 days against IDoList's every 3 weeks. On price, ads, in-app purchases 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. IDoList sells 2 in-app purchases, starting at $2.99 per month and Second Brain sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

IDoList ships an update every 3 weeks, Second Brain every 9 days. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

Scorecard1 real difference · 9 level
IDoList versus Second Brain: the parameters behind the verdict, then further details
ParameterIDoListSecond Brain
PriceFreeFree
Rating—4.5 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 3 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPad — betteriPhone
Requires iOS18.517.0 — better
Further details — not scored
Size26 MB12 MB
Age rating4+4+
DeveloperNIKLAS NERKAMPLiwei Xie

In-app purchases

2 purchases

IDoList

Subscriptions2
  • IDoList Pro – Monthly7 Days trial$2.991 Month
  • IDoList Pro – Yearly7 Days trial$22.991 Year
2 purchases

Second Brain

Subscriptions2
  • Second Brain Pro3 Days trial$4.991 Month
  • Second Brain Pro7 Days trial$39.991 Year

Questions

Is IDoList free?
IDoList is free to download, with in-app purchases available.
Is Second Brain free?
Second Brain is free to download, with in-app purchases available.
Do IDoList or Second Brain have ads?
Neither IDoList nor Second Brain shows ads.
Which is updated more often, IDoList or Second Brain?
IDoList ships an update every 3 weeks, and Second Brain every 9 days. Most recently, IDoList was updated on October 13, 2026 and Second Brain on October 10, 2026.

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