# MemoDen vs Mo Diary

The clearest difference is review sentiment: Mo Diary at 100% against MemoDen's 0%. MemoDen's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

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

MemoDen ships an update every 14 months, Mo Diary every 7 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | MemoDen | Mo Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (8 ratings)](https://appshunter.io/ios/app/mo-diary-diary/id1560843305/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 7 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 26 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SHIGEYUKI TAKAHASHI](https://appshunter.io/developer/437200400) | [Sergey Krivorotko](https://appshunter.io/developer/1552600319) |

## What reviewers say

### MemoDen

[App page](https://appshunter.io/ios/app/memoden/id740382762)

This calculator allows you to store up to five numbers (M1-M5) and view their sum in real-time. It includes functions to clear input, remember numbers, and clear all memory. It also offers tax calculation options for prices including or excluding consumption tax.

**Highlights:** Store up to five numbers (M1-M5), Real-time sum display, Clear input function, Remember numbers to memory, Clear all memory, Calculate price with tax, Calculate price without tax

**Features:** macOS Compatibility

**In-app purchases:** none


### Mo Diary

[App page](https://appshunter.io/ios/app/mo-diary-diary/id1560843305)

This app helps you record and organize your life's moments. Save important events, notes, and memories with the ability to add photos, filter, and search entries. A premium version offers advanced features like PDF export and password protection.

**Highlights:** Store and organize notes and memories, Add images to entries, Filter and search entries by date or text, Auto-saving of content, Password and biometric login, iCloud data synchronization

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium version | $2.99 | one-time |


## Frequently asked questions

### Is MemoDen free?

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

### Is Mo Diary free?

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

### Do MemoDen or Mo Diary have ads?

Neither MemoDen nor Mo Diary shows ads.

### Which is updated more often, MemoDen or Mo Diary?

MemoDen ships an update every 14 months, and Mo Diary every 7 months. Most recently, MemoDen was updated on October 20, 2026 and Mo Diary on October 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.*