# DayDo Calendar vs SecondBrain

The clearest difference is rating: SecondBrain at 5.0 against DayDo Calendar's 4.0. SecondBrain also leads on update cadence (every 3 days vs every 3 weeks) and device support (3 vs 1). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. DayDo Calendar sells 3 in-app purchases, starting at $1.99 per month and SecondBrain sells 3 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

SecondBrain holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

DayDo Calendar ships an update every 3 weeks, SecondBrain every 3 days. The most recent releases landed on September 8, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | DayDo Calendar | SecondBrain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/daydo-calendar/id6753119680/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/secondbrain-ai-memory/id6762130376/reviews)** |
| Number of ratings | 2 | **3** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 121 MB | 72 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ondrej Horak](https://appshunter.io/developer/1681103059) | [Federico Cesarini](https://appshunter.io/developer/1888767256) |

## What reviewers say

### DayDo Calendar

[App page](https://appshunter.io/ios/app/daydo-calendar/id6753119680)

Organize your daily life with a unified planner that integrates calendars, reminders, routines, and smart alarms. This app offers a modern approach to planning, helping you manage your schedule and personal habits efficiently in a single, elegant interface.

**Highlights:** Integrated calendar, Daily reminders, Recurring routines, Smart alarms, Elegant interface, Personal habit management

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly PRO | $1.99 | per month |
| Yearly PRO | $19.99 | per year |
| Lifetime PRO | $99.99 | one-time |


### SecondBrain

[App page](https://appshunter.io/ios/app/secondbrain-ai-memory/id6762130376)

This app automatically transcribes, titles, and files your spoken thoughts, creating a self-organizing note system. It can convert voice notes into calendar events, provide daily summaries, and allow you to chat with your saved information.

**Highlights:** Automatic transcription and titling, AI-powered self-organizing notes, Voice to calendar event creation, Daily morning briefing summaries, Chat with your notes for answers, 3D brain graph visualization, Full-text search, Cross-app sharing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SecondBrain Pro | $8.99 | per month |
| SecondBrain Pro Yearly | $34.99 | per year |
| SecondBrain Pro Yearly | $44.99 | per year |


## Frequently asked questions

### Is DayDo Calendar free?

DayDo Calendar is free to download, with in-app purchases available.

### Is SecondBrain free?

SecondBrain is free to download, with in-app purchases available.

### Which has better reviews, DayDo Calendar or SecondBrain?

SecondBrain is rated higher. DayDo Calendar averages 4.0 out of 5 from 2 ratings, while SecondBrain averages 5.0 from 3 ratings.

### Do DayDo Calendar or SecondBrain have ads?

Both DayDo Calendar and SecondBrain show ads.

### Which is updated more often, DayDo Calendar or SecondBrain?

DayDo Calendar ships an update every 3 weeks, and SecondBrain every 3 days. Most recently, DayDo Calendar was updated on September 8, 2026 and SecondBrain on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*