Comparison

i vs Memorize

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

Head to head
About

i

This app allows users to hide text in study materials using a filter, mimicking a red sheet for effective memorization. It supports photos and PDFs, enabling studying anytime, anywhere with just a smartphone.

Highlights
  • Hide text with red filter effect
  • Study photos and PDFs
  • Add check marks for progress
  • Efficient study with navigation
  • Use anytime, anywhere
Read full description

【Ranked #1 in the Education category (free)】 【Over 1 million downloads】 Featured in various media: ・Fuji TV "Minna no News (2017/2/9)": Red-sheet generation stunned! A revolution in memorization methods ・Benesse Manapla: Make high school life even more fun! 3 useful apps ・Nikkei Trendy Net "TODA Satoru’s Deep-Dive Report on Gadgets": How working adults use iPad and handwriting apps for learning i-Memorization Sheet is an app for memorization study that hides words, sentences, dates, etc. using a filter so you can study them. The app uses image analysis to reproduce the same effect as using a real red filter. Therefore, red text in reference books can be hidden simply by photographing it. You can also import entire reference books by converting them to PDF. With just an iPhone, you can study anytime, anywhere. 【Benefits of i-Memorization Sheet】 - Study anytime, anywhere—e.g., easily memorize with one hand on the train. - Carry as many pages as you want just by bringing your smartphone. - Disappears better than real red sheets. All reddish colors are hidden. Green is fine if it's a fluorescent highlighter. - You can add check marks anywhere. Double-tap where you want to place a mark. There is also a function to jump to the next check mark, making studying very efficient. 【Supported materials】 - Photos and PDFs can be used. 【Pricing】 You can use the app for free for up to 10 pages in total. If you want to use more files/pages, please purchase an add-on. Ads are displayed, but purchasing the add-on can disable them.

About

Memorize

Enhance your studies with a minimalist interface for efficient learning. Organize subjects into decks, track progress with notes and feedback, and visualize study habits. Set reminders and sync across devices for a seamless academic journey.

Highlights
  • Minimalist interface
  • Subject-based decks
  • Learning journal with notes
  • Study habit visualization
  • Customizable reminders
  • Cross-device syncing
Features
Read full description

Memorize - Elevate Your Learning Journey! Efficient Tools: Navigate through a minimalist interface designed for efficient and organized studying. Structured Learning: Personalize your study experience with subject-based decks for a streamlined approach. Knowledge Chronicle: Record your learning moments with dates, notes, and real-time feedback. Relive your academic journey. Insightful Learning Trends: Visualize your study habits, set goals, and enhance your learning experience with insightful trends. Study Reminders: Stay on track with gentle nudges, capturing progress and reflections on your academic endeavors. Seamless Across Devices: Switch seamlessly between iPhone, iPad, and Mac, maintaining harmony in your learning materials. Memorize+: Unlock advanced features with unlimited flashcards, enhanced organization, and customized learning experiences. Your learning journey, simply enhanced. Download Memorize now! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

i3 screens
Memorize4 screens

Verdict

The call

The clearest difference is ads: Memorize at none against i's shown. Memorize also leads on rating (4.5 vs 4.2) and device support (4 vs 2). i's advantage is update cadence (every 6 days vs every 3 weeks). On price, review sentiment, ratings volume and in-app purchases 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. i sells 10 one-off in-app purchases and Memorize sells 5 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Memorize holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 10 and 13 respectively. Written reviews complicate that: 43% of i's written reviews are positive against 40% of Memorize's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

i ships an update every 6 days, Memorize every 3 weeks. The most recent releases landed on September 22, 2026 and August 12, 2026 respectively.

Scorecard4 real differences · 6 level
i versus Memorize: the parameters behind the verdict, then further details
ParameteriMemorize
PriceFreeFree
Rating4.2 (10 ratings)4.5 (13 ratings) — better
Positive reviews42.9% of reviews — better40.0% of reviews
Number of ratings1013 — better
Update frequencyEvery 6 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPadiPhone, iPad, Mac, Vision Pro — better
Requires iOS18.017.0 — better
Further details — not scored
Size67 MB133 MB
Age rating4+4+
DeveloperBrainApp LLCJakub Milcarz

Customer experience

i

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews77 reviews
Positive42.9%
Neutral10.4%
Negative46.8%

Memorize

All ratings13 ratings
Positive92.3%
Neutral0.0%
Negative7.7%
Written reviews5 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

In-app purchases

10 purchases

i

One-time10
  • i-Memorize Sheet Remove ADs Option$0.99
  • imc00010$0.99
  • imc00020$0.99
Show 7 more
  • i-Mem-Contents imc00030$0.99
  • i-Mem-Contents imc00040$0.99
  • i-Mem-Contents imc00010$0.99
  • i-memorize Sheet File-Limit release add-on$2.99
  • i-memorize Sheet PDF page-Limit release add-on$4.99
  • Pro licence(campaign)$5.99
  • i-memorize Sheet Limit release add-on$6.99
5 purchases

Memorize

Subscriptions4
  • Memorize+ (Weekly)$1.997 Days
  • Memorize+ (Monthly)$3.991 Month
  • Memorize+ (Family)7 Days trial$9.991 Year
Show 1 more
  • Memorize+ (Annual)7 Days trial$19.991 Year
One-time1
  • Memorize+ (Lifetime)$49.99

Questions

Is i free?
i is free to download, with in-app purchases available.
Is Memorize free?
Memorize is free to download, with in-app purchases available.
Which has better reviews, i or Memorize?
Memorize is rated higher. i averages 4.2 out of 5 from 10 ratings, while Memorize averages 4.5 from 13 ratings.
Do i or Memorize have ads?
i shows ads; Memorize does not.
Which is updated more often, i or Memorize?
i ships an update every 6 days, and Memorize every 3 weeks. Most recently, i was updated on September 22, 2026 and Memorize on August 12, 2026.

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