Comparison

MEMOrizer app vs Boki Lens

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

Head to head
About

MEMOrizer app

Features
Read full description

MEMOrizer is a memo-style study app that lets you record notes and hide selected text for active recall. With a clean and minimal UI, you can create notes quickly, review them in random order, and even receive scheduled random notifications — allowing you to study effortlessly in the background. 【Features】 ・Simple, login-free note creation and management. A clean UI lets you write and save notes instantly. ・Supports both text and images. Capture diagrams, formulas, or snapshots and store them with your notes. ・Organize with folders, tags, and understanding levels. Keep your study materials structured and easy to find. ・Random review (flashcard mode). Shuffle your notes and review them continuously. Filter by last viewed time, understanding level, tags, or favorites. ・Random notification reminders. The app can send random notes as notifications, so you can review even in the background. ・Export your notes as a ZIP file to share with friends, classmates, or family. ・One-time purchase unlocks unlimited notes and removes ads. 【Recommended for】 ・Students preparing for exams, entrance tests, or certifications(the developer uses this app for medical studies!) ・People who want to study but often get distracted by their phone ・Anyone who wants to collect trivia or fun facts and memorize them ・Users who want to record everyday thoughts and revisit them later

About

Boki Lens

Features
Read full description

Learn profit, cash and financial statements through business examples in English and USD. Start free with 8 lessons and 24 questions; Premium adds 24 lessons. No app account required. JAPANESE GRADE 3 PRACTICE Available in the Japan course with the Japanese interface: explanations, worked examples, answer entry, review and original 60-minute mock exams. Learn how transactions connect profit, assets and cash. Practice answers and exam sessions are saved locally, not synced via iCloud. LEARN AND PRACTICE IN ENGLISH Global Basics has 8 chapters, 32 lessons and 96 questions in English and USD. Read explanations, explore worked examples and use Practice. Three drills cover account classification, debit/credit and journal entries. Today shows your next lesson and spaced reviews. TRY IT FREE Global Basics includes 8 free lessons and their 24 questions, the Cash or Invoice case, Journal Entry, the three core drills, and 3 company diagnoses. Premium unlocks the remaining 24 lessons and access to all 96 course questions. READ STATEMENTS AND RUN A COMPANY Explore 20 fictional company diagnoses: 3 free and 17 with Premium. Review related lessons and try a related business decision. Make quarterly decisions, post transactions, and review statements across 18 companies: Independent consultant is free; the other 17 require Premium. Close a year and continue into the next. Completed years and unfinished runs are saved on this device. EXPLORE THE JAPAN COURSE A cafe-based course uses JPY and Japanese bookkeeping conventions, with English and Japanese text. Stage 0–10, three core quiz modes, and Journal Entry are free. Three fictional industry case studies and three Year-in-Business runs are also free; Premium adds 17 of each. Workplace Starter connects financial statements to profit, cash, and later customer payments. Switch courses from Learn or Settings. Each keeps separate progress and practice journals. Global teaching content stays in English, including when the app interface is Japanese. PREMIUM One monthly, auto-renewing subscription includes the additional Global lessons, 17 Global company diagnoses, 17 Global company careers, and the Japan-course activities above. The local App Store price is shown before purchase. Manage or cancel in your Apple account settings; restore purchases in the app's Settings. OFFLINE AND ICLOUD Core learning works offline, with data saved on your device. Lesson progress, review history, and practice journals in both courses can sync via iCloud on devices using the same Apple Account with iCloud Drive enabled. Changes may take time to appear. No ads or advertising tracking. Dynamic Type and dark mode are supported. Fictional company data is for learning. Global Basics uses the assumptions stated in its lessons and does not provide country-specific tax advice or comprehensive US GAAP, IFRS, or certification-exam coverage. Privacy Sharing usage is optional. After you explicitly allow it, TelemetryDeck receives a random local ID's hash, random session ID, app version/build, test status, and screen, feature, learning and purchase-success events. Events may include language, track/content version, stage/lesson IDs, lesson/purchase entry categories, answer/correct counts, plan and product ID. Before consent, no events are sent or saved and no analytics ID is created. If you decline, all features remain available. Withdraw under Settings > Optional analytics to stop sending, remove the ID, and delete or invalidate unsent events. Withdrawal does not delete sent events; see the Privacy Policy for retention. We send no region/country/raw locale, screen text, transaction IDs, prices, Apple IDs, journal contents, amounts, free text, names or contacts. No advertising SDKs; analytics is not linked to you or used for ads/tracking. - Privacy Policy: https://minimalist-lab.github.io/app-info/bokilens_privacy_en.html - Terms of Use (EULA): https://minimalist-lab.github.io/app-info/bokilens_terms_en.html

Screenshots

MEMOrizer app4 screens
Boki Lens4 screens

Verdict

The call

The clearest difference is ads: Boki Lens at none against MEMOrizer app's shown. MEMOrizer app's advantage is update cadence (daily vs every 3 days). On price, in-app purchases, 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. MEMOrizer app sells 1 one-off in-app purchase and Boki Lens sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

MEMOrizer app ships an update daily, Boki Lens every 3 days. The most recent releases landed on October 30, 2026 and November 9, 2026 respectively.

Scorecard2 real differences · 4 level
MEMOrizer app versus Boki Lens: the parameters behind the verdict, then further details
ParameterMEMOrizer appBoki Lens
PriceFreeFree
Update frequencyDaily — betterEvery 3 days
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.6 — better18.0
Further details — not scored
Size12 MB14 MB
Age rating4+4+
DeveloperYu TakahashiMASATO NISHIURA

In-app purchases

1 purchases

MEMOrizer app

One-time1
  • メモライザ PRO$3.99
1 purchases

Boki Lens

Subscriptions1
  • Premium (Monthly)$2.991 Month

Questions

Is MEMOrizer app free?
MEMOrizer app is free to download, with in-app purchases available.
Is Boki Lens free?
Boki Lens is free to download, with in-app purchases available.
Do MEMOrizer app or Boki Lens have ads?
MEMOrizer app shows ads; Boki Lens does not.
Which is updated more often, MEMOrizer app or Boki Lens?
MEMOrizer app ships an update daily, and Boki Lens every 3 days. Most recently, MEMOrizer app was updated on October 30, 2026 and Boki Lens on November 9, 2026.

Other comparisons