seximal vs Optimem
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
seximal
Explore a world based on a six-base numbering system. This app offers tools to convert numbers, display time and dates, and perform calculations using seximal. It also includes an Apple Watch app and iOS widgets for convenient access.
- Number conversion with pronunciation
- Seximal time and calendar
- Length converter
- Seximal calculator
- Apple Watch app and complications
- iOS widgets
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Seximal (also called senary or heximal) is a numbering system that uses the number six as its base. This app provides a glims into what our world could look like if instead of using decimal, we used seximal. Features: - Number converter (with pronunciation) - Current time and calendar in a seximal system - Length converter - Seximal calculator - Apple Watch App (+ complications) - iOS Widgets This app was inspired by the YouTuber and linguist jan Misali. Check out his website at: seximal.net
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.
- Bite-sized learning sessions
- Spaced repetition system
- Multimedia flashcard support
- Progress tracking and stats
- Customizable study settings
- Dark mode
- Content creation and sharing
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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
Screenshots
Verdict
The clearest difference is review sentiment: seximal at 100% against Optimem's 80%. seximal also leads on rating (4.9 vs 4.7) and device support (6 vs 2). Optimem's advantage is update cadence (monthly vs every 2 months) and ratings volume (30 vs 9). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
seximal holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 9 and 30 respectively. Written reviews point the same way: 100% of seximal's written reviews are positive against 80% of Optimem's.
seximal ships an update every 2 months, Optimem monthly. Both last shipped on November 3, 2026.
| Parameter | seximal | Optimem |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (9 ratings) — better | 4.7 (30 ratings) |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 9 | 30 — better |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Mac, Apple TV, Apple Watch — better | iPhone, iPad |
| Requires iOS | 14.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 6 MB | 54 MB |
| Age rating | 9+ | 4+ |
| Developer | Henrik Storch | Organic Software LLC |
Customer experience
seximal
Optimem
In-app purchases
seximal
No in-app purchases
Optimem
No in-app purchases









