Comparison

Memo Stacker vs Nenrin

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

Head to head
About

Memo Stacker

This app helps you capture and organize your thoughts, ideas, and daily logs. It automatically stacks your entries chronologically, making it easy to look back on your past records through a visual timeline. Enjoy customizable features and secure data storage options.

Highlights
  • Timeline notes
  • Auto-organized by date
  • Habit tracking stats
  • Modern font customization
  • Dark mode support
  • iCloud Drive integration
  • Local data storage option
Features
Read full description

Stack your everyday life. A memo app for building up your thoughts like blocks. Memo Stacker is a memo app that makes “writing” and “looking back” as simple as possible. Ideas that come to you in the moment, diary entries, ToDos, life logs. Stack every kind of record like blocks and visualize your everyday life. “What was I thinking back then?” With Memo Stacker, you never have to wonder. By using iCloud Drive, which iOS users can use for free, Memo Stacker is designed so your data is not locked inside the app. If you use the same iCloud account, your data will not be lost when you change devices, and your important notes will remain even if you delete the app. Of course, your notes belong only to your account, so no one else, including the developer, can see them. Write: Start typing as soon as you open the app. Timestamps are added automatically. Stack: Notes are stacked chronologically and automatically organized by date. View: Browse your past records beautifully in a refined timeline format. ■ Timeline Format With No Organizing Needed Open the home screen and all your notes are arranged chronologically. No more creating folders or managing file names. Just swipe to instantly revisit your past self. ■ Automatically Organized Timeline View Notes are automatically organized by date. With intuitive navigation by year, month, and day, you can find records from years ago in an instant. ■ Stats That Reveal Your Habits See how much you have written through a heatmap. The joy of continuing to write helps support your habit. ■ Customization That Feels Like You Includes beautiful modern fonts and an eye-friendly dark mode. Because it is something you use every day, Memo Stacker is designed with care for both writing comfort and appearance. Even when using Local Mode without iCloud Drive: ■ Privacy and Backup You Can Trust Notes are stored only on your device with a local-first design. When changing devices, you can easily migrate your data to the cloud using your Google account. When using Memo Stacker on a MacBook, the optimized iPad version is available.

About

Nenrin

Features
Read full description

Read the years, zodiac and luck days of Japan — on one line In Japan, years are counted two ways at once. 2026 is also Reiwa 8, and official forms, licences, certificates and museum labels often use only the second form. Nenrin puts both on the same line. Save the birthdays of family and friends, along with anniversaries such as a wedding or a company founding, and see them year by year. Note: the app's interface is available in English, but the calendar data it shows — era names, zodiac signs, rokuyo — stays in Japanese, because that is how you will meet it on real documents. Readings are given in romaji, and tapping any of these terms opens an explanation of what it means and where it came from. ■ The list ・Western year, Japanese era year, zodiac animal and age on one line ・Opens centred on the current year ・Transition years show both era names, e.g. Keio 4 / Meiji 1 ・Covers the Edo period eras, not just the modern ones ・For Myself and birthday entries, the current year clearly distinguishes the age reached on the birthday from the age today ■ Three ways to read it ・Age — how old someone born in each year is today. No birth date needed ・Myself — how old you are in each year, from your date of birth ・Roster — ages for saved birthdays, or year-by-year counts for wedding anniversaries, company founding dates and other milestones ■ Jump ・Jump by age, Western year, or era year ・Converts era years that never existed, such as Showa 100 or Reiwa -20 ・The converted year appears as you type, so you get the answer without jumping ■ Any year in detail ・A full calendar, month by month ・Rokuyo, the six-day luck cycle used to choose wedding and funeral dates ・The moon phase for each day ・The moon as you would see it that evening; 大安 taian is marked in red and full moons in yellow ・Era transition days are marked in place ・Tap any term — an era name, zodiac sign, rokuyo, nine-star sign, yakudoshi or gaju — to read what it means and where it came from ・Write a note of up to 100 characters for any year, separately for yourself and each roster entry ■ Optional columns ・干支 eto — the zodiac animal, with its full sixty-cycle name ・九星 kyusei — your nine-star sign ・School entry and graduation years ・賀寿 gaju — longevity celebrations such as 還暦 kanreki at 60 ・厄年 yakudoshi — the unlucky years people visit a shrine for ■ Made to be readable ・Ages use the modern birthday-based count, with optional 数え年 kazoedoshi guidance ・Beginner mode explains each screen ・Four text sizes ・Light and dark appearance ・iPhone and iPad, portrait and landscape ■ Who it is for ・Anyone reading Japanese documents, licences or family registers ・Students of Japanese language, history or genealogy ・Residents of Japan filling in official forms ・Anyone who wants to understand how Japanese culture marks time — eras, zodiac cycles, lucky days ・Anyone curious about how Japan counts its years

Screenshots

Memo Stacker4 screens
Nenrin3 screens

Verdict

The call

The clearest difference is in-app purchases: Nenrin at none against Memo Stacker's 2. Nenrin also leads on ads (none vs shown) and update cadence (every 5 days vs every 2 weeks). On price, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Memo Stacker sells 2 in-app purchases, starting at $2.99 per month. Nenrin asks for nothing beyond the download.

UpkeepUpdate frequency

Memo Stacker ships an update every 2 weeks, Nenrin every 5 days. The most recent releases landed on October 2, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 5 level
Memo Stacker versus Nenrin: the parameters behind the verdict, then further details
ParameterMemo StackerNenrin
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 2 weeksEvery 5 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better17.0
Further details — not scored
Size90 MB6 MB
Age rating4+4+
DeveloperTrivial VenturesAzukid.com

In-app purchases

2 purchases

Memo Stacker

Subscriptions1
  • Pro plan Monthly$2.991 Month
One-time1
  • Remove Ads$2.99
None

Nenrin

No in-app purchases

Questions

Is Memo Stacker free?
Memo Stacker is free to download, with in-app purchases available.
Is Nenrin free?
Nenrin is free to download, with no in-app purchases.
Do Memo Stacker or Nenrin have ads?
Memo Stacker shows ads; Nenrin does not.
Which is updated more often, Memo Stacker or Nenrin?
Memo Stacker ships an update every 2 weeks, and Nenrin every 5 days. Most recently, Memo Stacker was updated on October 2, 2026 and Nenrin on October 15, 2026.

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