MemoDen vs Mo Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MemoDen
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.
- 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
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It is a simple calculator that memory can be seen. You can store five numbers of M1 ~ M5, the sum of them is displayed in the Sum at all times. - The role of each button - [C] : I will clear the number in the input. [M+] : I will remember the M1 numbers in the input. [MC] : I will clear the contents of the M1 ~ M5. [税込] : Price that includes consumption tax in Japan. [税抜] : Price minus the consumption tax in Japan.
Mo Diary
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.
- 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
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Mo Diary is your personal diary. LIST OF RECORDS. Store important events, notes, memories in one place. CONTROL. Delete entries or add them to "Favorites" with one touch (swipe). FILTERING BY DATE. By default, Mo Diary displays the records of the current month. If necessary, you can set the desired period and view the records included in it. FILTERING YOUR FAVORITE. Set a filter for entries that have been added to "Favorite". SEARCH. Mo Diary will find the necessary entries by text or title. AUTO SAVING. Create and edit records without losing content. PICTURE. Add an image or photo to your significant moments. Available to change, delete, view the added images. DATE OF RECORDING. In Mo Diary, you can set any recording date. DISPLAY SETTINGS. Choose a convenient interface option for your posts - it is possible to turn off the display of the title and / or image. WITHOUT ADVERTISING. The PREMIUM VERSION is available with a one-time purchase. Functionality of the premium version: REMOTE RECORDS. Access to deleted records for the last 30 days with the ability to restore the selected record / all records. PDF-FORMAT. Convert the selected record or all records to PDF format. PASSWORD LOGIN. Set the code to enter the application (in addition, by default, TouchID / FaceID login is available, if this option is activated on the device, it can be disabled). ICloud POSSIBILITIES. Data synchronization is possible if on the old and new devices: 1) Internet connection is provided 2) iCloud Drive option is active 3) iCloud option is active for Mo Diary app 4) iCloud has free storage 5) the same Apple ID is used 6) the "Sync with iCloud" option is activated in the application
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | MemoDen | Mo Diary |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.9 (8 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 8 — better |
| Update frequency | Every 14 months | Every 7 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 4 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | SHIGEYUKI TAKAHASHI | Sergey Krivorotko |
Customer experience
MemoDen
Mo Diary
In-app purchases
MemoDen
No in-app purchases
Mo Diary
- Premium version$2.99
