Comparison

MemU vs constant.

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

Head to head
About

MemU

This app allows users to import, study, and edit Anki flashcard decks offline on their iPhone and iPad. It supports various note types and offers a distraction-free interface for efficient learning.

Highlights
  • Import .apkg flashcard decks
  • Study with spaced repetition
  • Edit cards directly on device
  • Supports various note types (cloze, image occlusion, MathJax)
  • 100% offline functionality
  • Export decks anytime
  • Modern, distraction-free UI
Features
Read full description

MemU is the creator of Flashcard 2.0 — a new model of networked flashcards built around two dimensions of memory: time and connection. Flashcard 1.0 asks: “When should I see this again?” Flashcard 2.0 also asks: “What is this connected to?” MemU keeps spaced repetition at the center of learning, then adds another dimension: connect a card to the dictionaries, books, movies, notes, and other knowledge around it. - BRING YOUR EXISTING CARDS: Import Anki-compatible .apkg decks and start studying them directly in MemU. Create and study rich flashcards with text, cloze deletion, image occlusion, MathJax, images, audio, TTS, custom templates, and more. Compatible decks can also be exported to .apkg when needed. - MOVIES AS SOURCES: Import movie subtitles, search for text, and connect matching subtitles and movie clips directly to a card. Keep the dialogue and scene around what you are learning instead of remembering an isolated word or sentence. - =BOOKS AS SOURCES: Import ebooks and search their chapters and text. Connect a relevant passage to a card while keeping the book itself as the source of truth. - DICTIONARIES AS SOURCES: Import electronic dictionaries and search them directly inside MemU. Connect definitions, pronunciations, examples, and reference information to the card you are learning while keeping the original dictionary entry as the source. - YOUR OWN CARDS AS SOURCES: Your existing knowledge can become reusable context. Add a dictionary card template to a deck to make its notes searchable. Find useful content from the same deck or other collections and connect it to another card without copying or duplicating the original content. Your cards don't just store knowledge. They can become sources for other cards. - PRONUNCIATION INSIDE YOUR FLASHCARDS: Don't just recognize an answer. Say it. Add pronunciation practice to a flashcard, speak during review, and receive pronunciation feedback at word and phoneme level. Turn passive recognition into active production without leaving your review session. - NATURAL ONLINE TTS: Give your flashcards a voice with online text-to-speech. Listen to words, sentences, definitions, and examples directly while reviewing. FLASHCARD 1.0 + FLASHCARD 2.0 Spaced repetition helps answer: “When should I review this again?” Networked flashcards add: “What is this connected to?” MemU does both. MemU created Flashcard 2.0 to move flashcards beyond isolated question-and-answer pairs — while keeping the speed, flexibility, and spaced repetition that make flashcards powerful. **Anki is a registered trademark of Ankitects Pty Ltd. This app is not affiliated with or endorsed by Ankitects Pty Ltd.

About

constant.

Features
Read full description

constant. makes studying effortless. Upload your notes, textbooks, slides, or PDFs and let AI instantly generate questions for you. No more wasting time creating flashcards - just start learning. - Instant question decks from your own material - Interactive "Ask Camel" AI Chat to explain answers and follow-up questions - Spaced repetition to boost memory and recall - Search and share public decks - Study smarter, not longer With constant., you focus on learning - AI handles the prep.

Screenshots

MemU4 screens
constant.4 screens

Verdict

The call

The clearest difference is update cadence: constant. at every 3 days against MemU's weekly. MemU's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.6). On price, ads 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

MemU ships an update weekly, constant. every 3 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
MemU versus constant.: the parameters behind the verdict, then further details
ParameterMemUconstant.
PriceFreeFree
Rating4.8 (4 ratings) — better—
Positive reviews57.1% of reviews—
Number of ratings4 — better—
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.6
Further details — not scored
Size318 MB28 MB
Age rating4+4+
DeveloperBeijing Daoyehuo Technology Co.LtdChun-Huei Liu

In-app purchases

None

MemU

No in-app purchases

None

constant.

No in-app purchases

Questions

Is MemU free?
MemU is free to download, with no in-app purchases.
Is constant. free?
constant. is free to download, with no in-app purchases.
Do MemU or constant. have ads?
Neither MemU nor constant. shows ads.
Which is updated more often, MemU or constant.?
MemU ships an update weekly, and constant. every 3 days. Most recently, MemU was updated on October 24, 2026 and constant. on October 6, 2026.

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