Comparison

Rocket Memo vs Subrain

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

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.

Highlights
  • Instant thought capture
  • Tag-based organization
  • Lightning-fast search
  • Note reminders
  • Clean editor
Features
Read 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 flowβ€”no distractions, no delays. Organize Stay organized with tags. Work, personal notes, ideas, listsβ€”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 mindβ€”simple, functional, and beautifully fast.

About

Subrain

This minimalist note-taking app helps you remember important keywords and life directions. It offers a simple interface for jotting down tasks and life-defining thoughts, acting as an extension of your memory.

Highlights
  • Simple note writing
  • Organized pages for notes
  • Minimalist interface
  • Acts as an extra brain
  • Helps remember keywords
  • Tracks life directions
Features
Read full description

μš°λ¦¬λŠ” ν•˜λ£¨μ—λ„ λ§Žμ€ 일을 잊곀 ν•©λ‹ˆλ‹€. 그것이 ν•œ μ£Ό, ν•œ 달... 1λ…„ 이상 λˆ„μ λ˜λ©΄, μš°λ¦¬λŠ” μ–Όλ§ˆλ‚˜ λ§Žμ€ μ€‘μš”ν•œ ν‚€μ›Œλ“œλ₯Ό 잊으며 μ‚΄μ•„κ°€λŠ” κ±ΈκΉŒμš”? μ–΄μ©Œλ©΄ μΈμƒμ˜ 큰 λ°©ν–₯이 μ‘°κΈˆμ”© λ°”λ€” μˆ˜λ„ μžˆμŠ΅λ‹ˆλ‹€. μ΄λŸ΄λ•Œλ§ˆλ‹€, Subrain은 λ‹Ήμ‹ μ˜ μΈμƒμ—μ„œ μ΄μ •ν‘œ 같은 역할을 ν•  κ²ƒμž…λ‹ˆλ‹€. κ°„λ‹¨ν•œ ν•  일뢀터, 인생에 λŒ€ν•œ μ€‘μš”ν•œ ν‚€μ›Œλ“œλ₯Ό 마음껏 μ μ–΄λ³΄μ„Έμš”. Subrain은 λ³΅μž‘ν•œ 건 λ”± μ§ˆμƒ‰μΈ λ―Έλ‹ˆλ©€λ¦¬μŠ€νŠΈλ₯Ό μœ„ν•œ λ…ΈνŠΈμž…λ‹ˆλ‹€. 마치 λ‘λ‡Œκ°€ ν•˜λ‚˜ 더 생긴 κ²½ν—˜μ„ ν•΄λ³΄μ„Έμš”. λ…ΈνŠΈ μž‘μ„±, 그리고 λ…ΈνŠΈλ“€μ΄ λ‹΄κΈ΄ νŽ˜μ΄μ§€. 이 두 κ°€μ§€λ§Œ κΈ°μ–΅ν•˜μ„Έμš”. - We forget many things every day. If it accumulates over 1 month, 6 months... over a year, how many important keywords do we forget? Maybe the big direction of your life will change little by little. At times like this, Subrain will act like a milestone in your life. Feel free to write down everything from simple things to do to important keywords about your life. Subrain is a notebook for minimalists who hate complexity. Feel as if you have an extra brain. Just remember these two things: Writing notes and pages containing notes.

Screenshots

Rocket Memo4 screens
Subrain4 screens

Verdict

The call

The clearest difference is in-app purchases: Subrain at none against Rocket Memo's 5. Subrain also leads on review sentiment (100% vs 80%) and iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Rocket Memo sells 5 in-app purchases, starting at $0.99 per month. Subrain asks for nothing beyond the download.

UpkeepUpdate frequency

Rocket Memo ships an update every 2 weeks, Subrain every 8 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

Scorecard4 real differences Β· 4 level
Rocket Memo versus Subrain: the parameters behind the verdict, then further details
ParameterRocket MemoSubrain
PriceFreeFree
Positive reviews80.0% of reviews100.0% of reviews β€” better
Update frequencyEvery 2 weeksEvery 8 days β€” better
AdsNoNo
In-app purchasesYesNo β€” better
MonetizationFreemiumFree β€” better
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS18.015.0 β€” better
Further details β€” not scored
Size6 MB41 MB
Age rating4+4+
DeveloperYoshinori KasayaJichan Hwang

Customer experience

Rocket Memo

Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Subrain

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

Rocket Memo

Subscriptions2
  • Rocket Pro Monthly$0.991 Month
  • Rocket Pro Yearly$5.991 Year
One-time3
  • Small Coffee$0.99
  • Croissant & Coffee$3.99
  • Cake & Coffee$9.99
None

Subrain

No in-app purchases

Questions

Is Rocket Memo free?
Rocket Memo is free to download, with in-app purchases available.
Is Subrain free?
Subrain is free to download, with no in-app purchases.
Do Rocket Memo or Subrain have ads?
Neither Rocket Memo nor Subrain shows ads.
Which is updated more often, Rocket Memo or Subrain?
Rocket Memo ships an update every 2 weeks, and Subrain every 8 days. Most recently, Rocket Memo was updated on October 24, 2026 and Subrain on October 30, 2026.

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