MemSurf vs Bias Handbook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MemSurf
This app transforms your collected notes into personalized lessons and daily exercises to enhance knowledge retention. It adapts to your learning speed and goals, helping you build long-term understanding and recall.
- Bespoke lessons from your notes
- Short daily exercises
- Science-based spaced repetition
- Personalized learning goals
- Sprint and deadline modes
- Habit-building streaks
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Every chapter of your life needs its own way of learning — your hobbies, your career, school, the things you must remember, and the things you simply want to. HOW MEMSURF ADAPTS TO YOU Every quiz and lesson adapts — to the type of content you're studying, how you're actually performing, and the learning goal you've set. Review timing adjusts automatically. No two study sessions look the same, because no two people (or days) are the same. THE LEARNING LADDER Real learning isn't one pass through a deck. MemSurf moves you through four stages — Expose, Differentiate, Recall, Apply. That means: see the new information, tell it apart, recall it cold, then use it in a practical way. PICK YOUR GOAL Different situations need different learning modes and scheduling: - Keep Fresh — gentle upkeep so you never fully forget - Sprint Mode — fast memorization when time is short - Deadline Mode — build toward a specific date, like an exam, a date or a big presentation - Occasional Review — light touches, no pressure SEE YOUR GAPS. WATCH YOUR KNOWLEDGE TREE GROW. MemSurf identifies your knowledge gaps, tracks them over time, and recommends exactly what to review next. As each gap disappears, your knowledge tree grows and you become a better, more knowledgeable version of yourself. LESS FRICTION THAN ANKI. MORE STRUCTURE THAN QUIZLET. No deck design, no card templates, no manual spaced-repetition math. Send in what you want to learn — a PDF, an online article, a voicenote, a screenshot — and MemSurf builds the lesson and the review schedule for you. BUILT TO OUTLAST SCHOOL Students graduate. Curiosity doesn't. MemSurf is for lifelong learners, professionals keeping skills sharp, parents who want to stay close to what their kids are learning — and yes, students too, because every student eventually becomes one of the other three. The habit you build now is the one you'll still have in ten years. Send it in. Show up daily. We take care of the rest. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Bias Handbook
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Bias Handbook is a curated reference guide to the cognitive and behavioral biases that shape human thinking, judgment, and decision-making — now with visual diagrams for every bias and a built-in library of the behavioral-design frameworks professionals use to change behavior. Explore well-known biases such as confirmation bias, anchoring, survivorship bias, framing effects, the availability heuristic, and many more — each with a clear definition, real-world examples, a visual diagram, and links to related biases. New in this version: the Frameworks tab. Go beyond spotting biases to actually applying behavioral science, with 12 of the field's most trusted frameworks — COM-B, the Behaviour Change Wheel, the Theoretical Domains Framework, the BCT Taxonomy, EAST, MINDSPACE, Nudge, the Fogg Behaviour Model, Self-Determination Theory, Dual-Process (System 1/2), the Theory of Planned Behaviour, and the Transtheoretical Model. Each is explained in depth, illustrated with its own diagram, and cited to its original peer-reviewed or government source. Designed for students, researchers, product teams, behavioral scientists, marketers, investors, and anyone curious about how the mind works, Bias Handbook makes complex behavioral concepts easy to understand and accessible anywhere. Features: • A comprehensive, growing library of cognitive and behavioral biases • Visual diagrams — every bias has a clean, color-coded schematic that captures the idea at a glance • NEW — Frameworks tab: 12 in-depth behavioral-design frameworks (COM-B, EAST, Nudge, Fogg, and more), each with its own diagram • Diagnostic questions, end-to-end worked examples, implementation playbooks, templates, and practice exercises for every framework • Every framework cited to its original trusted source • Fast in-app search across names, aliases, and summaries • Filter by category — Decision-making, Memory, Belief & Probability, Social, and Self-perception, each with its own color • Bias of the Day — a fresh bias on the banner the first time you open the app each day • Bookmarks — save biases worth revisiting in a dedicated tab • Personal notes — capture how each bias shows up in your work or life, with a tab listing every bias you've noted • Daily reminders — set a time for a gentle nudge to learn one bias a day • Clean, intuitive browsing experience • Cross-references between related biases • An educational reference for psychology and decision science • Regular updates with new content Built by the Center for Behavioral Decisions, a research and consulting unit working at the intersection of behavioral economics, psychology, and decision science. Understand how biases influence decisions — and learn the frameworks to change behavior in everyday life and work.
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Verdict
The clearest difference is price: MemSurf at Free against Bias Handbook's $0.99. MemSurf also leads on update cadence (every 8 days vs every 3 weeks). Bias Handbook's advantage is in-app purchases (none vs 7) and ads (none vs shown). On device support 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
MemSurf is free to download; Bias Handbook costs $0.99 up front. MemSurf sells 7 in-app purchases, starting at $9.99 per month. Bias Handbook asks for nothing beyond the download.
MemSurf ships an update every 8 days, Bias Handbook every 3 weeks. The most recent releases landed on October 30, 2026 and October 7, 2026 respectively.
| Parameter | MemSurf | Bias Handbook |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 8 days — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26 | 17.0 — better |
| Further details — not scored | ||
| Size | 237 MB | 2 MB |
| Age rating | 4+ | 17+ |
| Developer | Sehajroop Singh | Stepapp, Inc. |
In-app purchases
MemSurf
- Pro Monthly$9.991 Month
- Pro Yearly$95.991 Year
- Tiny Boost$0.99
- AI Credits Small Boost$2.99
- Purchase Gems$4.99
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- AI Credits Medium Boost$6.99
- AI Credits Heavy Boost$12.99
Bias Handbook
No in-app purchases









