Optimem vs TestByState
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
TestByState
Prepare for Massachusetts MCAS Math with grade-specific practice tests and daily sets for grades 3-8 and 10. Focus on specific topics or complete full-length simulations with detailed explanations and progress tracking for parents. One subscription covers up to five learners.
- Grade-specific practice (3-8, 10)
- Daily practice sets
- Practice by topic
- Full practice tests
- Detailed answer explanations
- Parent progress insights
- Supports up to 5 learners
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Math practice built for your state test. TestByState gives students targeted math practice while giving parents a clear view of their progress. Build a routine with daily questions, topic-focused review, and full-length practice tests designed around supported state assessments. Connect your child’s iPhone or iPad and see scores, strengths, and areas that need more practice from the parent dashboard on your own device. CHOOSE YOUR ASSESSMENT • Massachusetts MCAS Math — Grades 3–8 and 10 • Florida FAST Math — Grades 3–8 • Virginia SOL / Growth Math — Grades 3–8 • North Carolina EOG Math • Georgia Milestones Math • Ohio State Tests Math • Tennessee TCAP Math • Arizona AASA Math • New Jersey NJSLA Math See the assessment selector for supported grades. Each assessment keeps its own content, reporting categories, practice forms, calculator rules, and reference materials. Florida practice uses fixed-form PM3-style questions; the operational FAST assessment is computer-adaptive. STUDENTS PRACTICE. PARENTS FOLLOW PROGRESS. • Fresh questions for daily practice • Focused practice by topic • State-specific full and section practice tests • Clear explanations and answer review • Parent progress, recent results, and areas to practice next • Separate learner profiles with assessment-specific histories • Student-device pairing and optional practice reminders Parents create and manage the account, choose an assessment and grade, and connect each child’s device with a pairing code or QR code. Students practice in their own learner profile while parents review their progress. You can also use the same device for practice. Switching assessments keeps practice and progress separate. ONE PLAN. YOUR WHOLE FAMILY. One TestByState All Access subscription includes all supported state assessments, all included practice modes, and up to 5 learners per state. Choose monthly or annual billing. An active subscription is required for access. Your localized price, renewal terms, and any eligible introductory offer are shown before purchase. Creating an account does not start a free trial. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel an Apple subscription in your Apple account settings. Restore Purchases is available in the app. TestByState is an independent practice product. It is not affiliated with, endorsed by, or an official product of any state education agency. Questions are original practice content. Results are not official state test scores or guaranteed score predictions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Service terms: https://testbystate.com/terms Privacy: https://testbystate.com/privacy Support: https://testbystate.com/support
Screenshots
Verdict
The clearest difference is in-app purchases: Optimem at none against TestByState's 2. Optimem also leads on ratings volume (30 vs 1). TestByState's advantage is rating (5.0 vs 4.7) and update cadence (weekly vs monthly). On price, ads, 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
Both are free to download. TestByState sells 2 in-app purchases, starting at $7.99 per month. Optimem asks for nothing beyond the download.
TestByState holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Optimem has 30 ratings behind it against 1, so its average is the more settled of the two.
Optimem ships an update monthly, TestByState weekly. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.
| Parameter | Optimem | TestByState |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (30 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 30 — better | 1 |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 54 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Organic Software LLC | Mahdi Alhady |
Customer experience
Optimem
TestByState
In-app purchases
Optimem
No in-app purchases
TestByState
- MCAS Math Test Prep Monthly3 Days trial$7.991 Month
- MCAS Math Test Prep Annual7 Days trial$29.991 Year









