Rocket Memo vs Simple Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rocket Memo
Capture thoughts instantly with this fast and organized notepad. Set reminders for important notes and find anything quickly with a powerful search. Designed for seamless idea management.
- Instant thought capture
- Tag-based organization
- Lightning-fast search
- Note reminders
- Clean editor
Read full descriptionHide full description
Simple. Fast. Smart. Capture your thoughts instantly and keep them perfectly organized. A sleek, lightweight notes app designed to move as fast as your ideas. Write Write the moment inspiration strikes. A clean and focused editor helps you stay in the flow—no distractions, no delays. Organize Stay organized with tags. Work, personal notes, ideas, lists—create your own simple yet powerful system of organization. Search Find what you need, instantly. A lightning-fast search engine filters thousands of notes in a flash. Remind Forget nothing. Set reminders for important notes and get notified right on time. Whether you’re working, planning, or just thinking out loud, this app keeps up with your mind—simple, functional, and beautifully fast.
Simple Diary
Read full descriptionHide full description
Forget the pressure of writing long entries. This app makes journaling simple and fun, letting you quickly jot down a single thought, a quick feeling, or the day's highlight. It's designed to fit seamlessly into your busy life, helping you build a positive habit without the fuss. "What's on your mind today?" "How was that meeting?" "Did something make you smile?" Your one-liners become a personal timeline, a digital scrapbook of your journey. Easily look back at your entries through a clean calendar view or a simple list, and rediscover those small, significant moments that make up your unique story. It's about making mindfulness easy and accessible. If you're looking for a simple way to reflect, track your mood, or just keep a quick record of your days, the "One-Liner Journal" is perfect for you. Start capturing your story, one line at a time!
Screenshots
Verdict
The clearest difference is in-app purchases: Simple Diary at none against Rocket Memo's 5. Simple Diary also leads on iOS requirement (16.6 vs 18.0). Rocket Memo's advantage is ads (none vs shown) and update cadence (every 10 days vs every 3 months). On price 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. Rocket Memo sells 5 in-app purchases, starting at $0.99 per month. Simple Diary asks for nothing beyond the download.
Rocket Memo ships an update every 10 days, Simple Diary every 3 months. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.
| Parameter | Rocket Memo | Simple Diary |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | — |
| Update frequency | Every 10 days — better | Every 3 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 6 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Yoshinori Kasaya | Kana Uchida |
In-app purchases
Rocket Memo
- Rocket Pro Monthly$0.991 Month
- Rocket Pro Yearly$5.991 Year
- Small Coffee$0.99
- Croissant & Coffee$3.99
- Cake & Coffee$9.99
Simple Diary
No in-app purchases








