Comparison

Optimem vs ListLang

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

Head to head
About

Optimem

Master any subject quickly with science-backed flashcards. Learn in short, engaging sessions using spaced repetition and multimedia support. Track your progress and customize your study experience with a simple, distraction-free interface.

Highlights
  • Bite-sized learning sessions
  • Spaced repetition system
  • Multimedia flashcard support
  • Progress tracking and stats
  • Customizable study settings
  • Dark mode
  • Content creation and sharing
Features
Read full description

Optimem helps you study & memorize any topic as fast as possible - Start learning in seconds. Choose from a wide variety of topics across Spanish, Music, Programming, and more. - Learn in 1-2 minute bite-sized sessions, like while waiting in line or on a bus. Quickly learn and practice on a fast path to mastery. - Experience simple, delightful design combined with cutting-edge scientific techniques. Together, learning can be more efficient and more enjoyable. Features - Freely and instantly download learning materials in the app from a wide variety of subjects - Seamless feed of questions to make learning fast and easy - Spaced repetition system (also known as SRS or Leitner system) which lets you spend less time learning - Sound and haptics feedback (short vibrations) to reinforce correct and incorrect answers - Confetti blasts on correct answer streaks for more delight - Support for images, audio, text, emojis and markdown formatting for flash cards - Support for text-to-speech for pronunciation and listening practice - Stats about your learning progress and rate - List and explore all cards in a topic - Customize new and review questions per day - Dark mode - Simple and distraction-free interface - Experimental and controversial Instant Brain Upload mode* - Connect and transfer content between your phone and another computer - Open source learning materials - Create, edit, remix, and share any learning materials Languages: - Spanish - French - Japanese – Hiragana & Katakana - Hindi – Devanagari alphabet - Russian – Cyrillic alphabet - Korean – Hangul alphabet - Mandarin Chinese - Norwegian - International morse code - Braille - American sign language - Toki Pona – a language with only ~120 words, designed to be simple and positive Other topics: - Piano keys - Music theory – music intervals & modes - Rust programming language - How to count in binary - … and growing! Learning materials can be created, edited, and shared by anyone. Brought to you by Organic Software. Privacy Policy: - https://optimem.org/privacy Have feedback or questions? - Contact us via https://optimem.org/discord

About

ListLang

Master languages by focusing on the most frequent words in context. This app helps intermediate learners overcome plateaus with smart vocabulary acquisition and progress tracking. Engage with a global community and achieve fluency through effective, context-based learning.

Highlights
  • Learn 20+ languages
  • Focus on high-frequency words
  • Context-based vocabulary acquisition
  • Overcome intermediate plateaus
  • Progress tracking and statistics
  • Global community leaderboards
  • Free language courses
Features
Read full description

Learn a language to fluency with ListLang! ListLang is a fun, free app for learning 20+ languages by learning the most frequent words in context. The top 1,000 most frequent words account for 85% of all text and speech. The top 5,000 account for 95%. It's really important to learn these words. Designed for intermediate language learners, ListLang helps you learn these words on your path to fluency. Learning words in context helps you naturally understand their meaning and use cases, while avoiding the rote memorization of definitions. Whether you’re learning a language for travel, school, career, or family and friends, you’ll love learning with ListLang. Why ListLang? • ListLang is fun and effective. Learning words in context helps you naturally understand their meaning and use cases, while avoiding the rote memorization of definitions. • Overcome the intermediate plateau. Designed by language and computer science experts, ListLang uses machine-learning to help you learn vocabulary smarter and faster. • Track your progress. Work toward your language learning goals with useful statistics and achievements when you make practicing a daily habit! • Stay motivated with competitive leaderboards as you learn alongside our global community. • Every language course is free. Learn Spanish, French, German, Portuguese, Dutch, Russian, English, Czech, Turkish, Chinese, Korean, Japanese, Persian, Italian, Polish, Romanian, and Finnish! Privacy Policy: https://www.listlang.com/privacy.html Terms of Service: https://www.listlang.com/terms.html

Screenshots

Optimem4 screens
ListLang4 screens

Verdict

The call

The clearest difference is in-app purchases: Optimem at none against ListLang's 2. ListLang's advantage is review sentiment (89% vs 80%) and iOS requirement (12.0 vs 16.0). On price, rating, ratings volume and update cadence 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. ListLang sells 2 in-app purchases, starting at $12.99 per month. Optimem asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Optimem against 4.6 for ListLang. Both are backed by a comparable volume of ratings — 30 and 38 respectively. Written reviews are what separate them: 80% of Optimem's written reviews are positive against 89% of ListLang's.

UpkeepUpdate frequency

Optimem ships an update monthly, ListLang every 3 weeks. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Optimem versus ListLang: the parameters behind the verdict, then further details
ParameterOptimemListLang
PriceFreeFree
Rating4.7 (30 ratings) — better4.6 (38 ratings)
Positive reviews80.0% of reviews88.9% of reviews — better
Number of ratings3038 — better
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.012.0 — better
Further details — not scored
Size54 MB78 MB
Age rating4+4+
DeveloperOrganic Software LLCKlavena LLC

Customer experience

Optimem

All ratings30 ratings
Positive93.3%
Neutral0.0%
Negative6.7%
Written reviews20 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

ListLang

All ratings38 ratings
Positive86.8%
Neutral5.3%
Negative7.9%
Written reviews9 reviews
Positive88.9%
Neutral0.0%
Negative11.1%

In-app purchases

None

Optimem

No in-app purchases

2 purchases

ListLang

Subscriptions2
  • ListLang Premium$12.991 Month
  • ListLang Premium$99.991 Year

Questions

Is Optimem free?
Optimem is free to download, with no in-app purchases.
Is ListLang free?
ListLang is free to download, with in-app purchases available.
Which has better reviews, Optimem or ListLang?
Optimem is rated higher. Optimem averages 4.7 out of 5 from 30 ratings, while ListLang averages 4.6 from 38 ratings.
Do Optimem or ListLang have ads?
Neither Optimem nor ListLang shows ads.
Which is updated more often, Optimem or ListLang?
Optimem ships an update monthly, and ListLang every 3 weeks. Most recently, Optimem was updated on October 20, 2026 and ListLang on October 24, 2026.

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