# 3sec Diary vs Memories

The clearest difference is in-app purchases: Memories at none against 3sec Diary's 1. Memories also leads on ads (none vs shown) and update cadence (every 5 months vs every 26 months). 3sec Diary's advantage is iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. 3sec Diary sells 1 one-off in-app purchase. Memories asks for nothing beyond the download.

3sec Diary ships an update every 26 months, Memories every 5 months. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 3sec Diary | Memories |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/memories/id1616337665/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 26 months | **Every 5 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 12 MB | 66 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [KENJI KANEMOTO](https://appshunter.io/developer/402720982) | [Takuya Aso](https://appshunter.io/developer/932255581) |

## What reviewers say

### 3sec Diary

[App page](https://appshunter.io/ios/app/3sec-diary/id985967203)

Quickly log daily activities and feelings in just three seconds. Your entries are securely stored in your iPhone Calendar, ensuring data safety and easy access. This tool helps you preserve memories and makes research and sharing effortless.

**Highlights:** 3-second daily logging, Calendar integration, Secure data storage, Easy research and sharing, Memory preservation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Eliminate Ads | $0.99 | one-time |


### Memories

[App page](https://appshunter.io/ios/app/memories/id1616337665)

Track your Tokyo Metro Tozai Line train rides, noting train types and origins. View station timetables and real-time operational status. Share your ride history and discover train formation rankings. Supports Apple Watch.

**Highlights:** Ride logging and history viewing, Train formation rankings, Real-time operational status, Full network timetables, Apple Watch support, Ride sharing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3sec Diary free?

3sec Diary is free to download, with in-app purchases available.

### Is Memories free?

Memories is free to download, with no in-app purchases.

### Do 3sec Diary or Memories have ads?

3sec Diary shows ads; Memories does not.

### Which is updated more often, 3sec Diary or Memories?

3sec Diary ships an update every 26 months, and Memories every 5 months. Most recently, 3sec Diary was updated on October 4, 2026 and Memories on October 8, 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.*