Comparison

Amai Calc Lite vs Rub Memo

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

Head to head
About

Amai Calc Lite

Features
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"Amai Calc Lite" is a simple calculator app with a colorful, candy-like interface. - The full expression is always visible, so you never lose track of your calculation. - Haptic feedback (can be toggled on/off) makes every tap feel satisfying and precise. - Made a mistake? No problem β€” just tap the backspace key to correct your expression. - Tap anywhere in the expression to move the cursor and re-enter any number or operator on the spot. - Your previous calculation result is displayed as history for easy reference. - Choose from 2 display themes to suit your style. β—† For even more features, check out the full version β€” "Amai Calc"! With Amai Calc, you get: - No ads. Ever. - 13 themes and matching icons β€” pick a color that fits your mood. - 9 digit separator styles to choose from β€” spaces, commas, periods, Japanese notation, and more. - A history list of up to 20 entries. Every number in the history view doubles as a re-entry button, making it easy to reuse the same values repeatedly. - A built-in one-handed mode, great for larger screens β€” calculate quickly no matter the situation. - Copy and paste your results with ease. - Hardware keyboard support β€” type your calculations on iPad or Mac just as naturally.

About

Rub Memo

This app allows you to erase text by rubbing your finger over it, mimicking the feel of erasing pencil on paper. It also offers a home screen widget for quick access, reordering paragraphs, and inserting various media like tables, checklists, and drawings.

Highlights
  • Erase text with finger rub
  • Home screen widget for notes
  • Reorder paragraphs by long-press and drop
  • Insert tables, checklists, images, and drawings
  • Full-text search with highlighted matches
  • Lock notes with Face ID/Touch ID
  • Export and share as PDF
Features
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β–  Erase with Your Finger Turn on β€œEraser” in the toolbar, then trace over the text you want to remove. Erase one character at a time without selecting a range. Rewrite as easily as rubbing out pencil marks on paper. If you erase too much, tap β€œUndo” to bring it back. β–  Meet Your Walking Cat A pixel-art cat strolls around your note screen. Choose from Calico, Black, or Robot, and enjoy 38 animations, including walking, jumping, and relaxing. Tap the cat to make it move out of your way. You can also turn it off in Settings. β–  Home Screen Widget Check the last note you opened right from your Home Screen. Tap the widget to open that note instantly. β–  More Features β€’ Touch and hold paragraphs to move and reorder them β€’ Insert tables, checklists, images, and hand-drawn sketches β€’ Use the eraser to remove inserted items, including tables and images β€’ Search all your notes with matching text highlighted β€’ Lock individual notes with Face ID / Touch ID β€’ Export and share notes as PDFs β€’ Switch between Japanese and English β€’ Adjust text size, fonts, ruled lines, and eraser width β–  No Ads, No In-App Purchases, No Account Required The app does not collect your data. Your notes are stored on your device and are never sent to external servers by the app.

Screenshots

Amai Calc Lite2 screens
Rub Memo4 screens

Verdict

The call

The clearest difference is ads: Rub Memo at none against Amai Calc Lite's shown. Amai Calc Lite's advantage is update cadence (every 3 days vs every 6 days). On price, in-app purchases, device support and iOS requirement 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Amai Calc Lite ships an update every 3 days, Rub Memo every 6 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard2 real differences Β· 6 level
Amai Calc Lite versus Rub Memo: the parameters behind the verdict, then further details
ParameterAmai Calc LiteRub Memo
PriceFreeFree
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 3 days β€” betterEvery 6 days
AdsYesNo β€” better
In-app purchasesNoNo
Monetizationβ€”Free
DevicesiPhone, iPad β€” betteriPhone
Requires iOS17.616.0 β€” better
Further details β€” not scored
Size10 MB14 MB
Age rating4+4+
DeveloperAmaitorteseiji honda

In-app purchases

None

Amai Calc Lite

No in-app purchases

None

Rub Memo

No in-app purchases

Questions

Is Amai Calc Lite free?
Amai Calc Lite is free to download, with no in-app purchases.
Is Rub Memo free?
Rub Memo is free to download, with no in-app purchases.
Do Amai Calc Lite or Rub Memo have ads?
Amai Calc Lite shows ads; Rub Memo does not.
Which is updated more often, Amai Calc Lite or Rub Memo?
Amai Calc Lite ships an update every 3 days, and Rub Memo every 6 days. Most recently, Amai Calc Lite was updated on October 29, 2026 and Rub Memo on October 24, 2026.

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