3sec Diary vs UDWriterPro
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
3sec Diary
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.
- 3-second daily logging
- Calendar integration
- Secure data storage
- Easy research and sharing
- Memory preservation
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This "3sec Diaryโ is not just a diary. You can input what you did, how you feel in this tool.It will take only 3 seconds!Your time will be saved. And you can leave it on your calendar on iPhone as long as you want. "3sec Diary โ data is not recorded on App on your iPhone.The data is recorded to your iPhone Calendar.You never miss your data when something wrong with this App. Researching ,synchronizing,sharing are so easy. This โ3sec Diaryโ is not just a diary, but your memories.
UDWriterPro
This app enables handwritten communication, offering an innovative approach to digital notes and messages. Designed primarily for iPad, it also functions on iPhone, bridging the gap between traditional writing and modern technology.
- Handwritten communication
- Hybrid communication tool
- Designed for iPad
- iPhone compatibility
- Innovative handwriting
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This application is for hand writing communication. There are many use case using this app. This app is designed for iPad, but can use on iPhone. This is a innovation about hand writing.
Screenshots
Verdict
The clearest difference is review sentiment: UDWriterPro at 100% against 3sec Diary's 60%. UDWriterPro also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. 3sec Diary sells 1 one-off in-app purchase. UDWriterPro asks for nothing beyond the download.
3sec Diary ships an update every 26 months, UDWriterPro every 2 weeks. The most recent releases landed on July 4, 2026 and September 14, 2026 respectively.
| Parameter | 3sec Diary | UDWriterPro |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 60.0% of reviews | 100.0% of reviews โ better |
| Update frequency | Every 26 months | Every 2 weeks โ better |
| Ads | Yes | No โ better |
| In-app purchases | Yes | No โ better |
| Monetization | Free with in-app purchases | Free โ better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 โ better | 13.0 |
| Further details โ not scored | ||
| Size | 12 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | KENJI KANEMOTO | Shamrock Records, Inc. |
Customer experience
3sec Diary
UDWriterPro
In-app purchases
3sec Diary
- Eliminate Ads$0.99
UDWriterPro
No in-app purchases
Questions
Is 3sec Diary free?
Is UDWriterPro free?
Do 3sec Diary or UDWriterPro have ads?
Which is updated more often, 3sec Diary or UDWriterPro?
Other comparisons
