MarginNote 4 vs FlowLog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MarginNote 4
This app integrates reading, note-taking, mind mapping, and flashcards into a unified study environment. It supports active learning with features like study sets, book compilation, and dual-article views. Enhance your understanding with visual learning tools and AI-powered content extraction for long-term memory retention.
- Integrated reading, note-taking, mind mapping, and flashcards
- Quick Extend Note and Handwriting Layers for annotation
- Study Set for organizing PDFs, EPUBs, videos, and audio
- Mind Map and Concept Diagram for visual learning
- AI Content Detection for formula and chart extraction
- FSRS spaced-repetition algorithm for reviews
- iCloud sync across Apple devices
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MarginNote is the PDF study tool for deep readers. One excerpt is a PDF highlight, a mind map node, and a flashcard — one capture, three places. This is the Card Axis architecture, so you stop ferrying content between a PDF reader, a notes app, and a flashcard tool. A decade of iteration. 188K+ App Store ratings. 【Four Featured Mechanics】 ▸ Card Axis — One excerpt, three renders. Document highlight, mind map node, and flashcard are the same card seen from three angles. ▸ Title Link — Old notes auto-surface in new documents. When a familiar concept appears in what you're reading, your past annotation lights up on the page. ▸ Extended Note — Long-press anywhere on a PDF to open writing space. No anchored text required; three display modes (inline / margin / collapsed). ▸ Immersive Mode (4.4) — Three-state toggle: Read / Write / Recall. UI folds away. Recall blurs excerpts with Gaussian blur — tap to reveal only after you've actually recalled. 【AI Capabilities (introduced in 4.2)】 AI book breakdown · AI OCR templates · AI translation · AI Q&A · AI flashcard generation Our stance is AI as assistant, not replacement — every suggestion can be saved as your own thinking node, never thinking for you. 【Apple Intelligence (iOS 26+)】 Recall Mode hints can run on-device via Apple Intelligence — pick "Apple AI" or "cloud LLM" in Settings. With Apple AI selected, three tiers of help — Neighbor Coordinate · Reasoning Prompt · Key Distinction — are generated by Apple Foundation Models right on your device: no network calls, no AI credits used, your notes never leave your device. Even if you've selected cloud LLM, going offline auto-falls back to Apple Intelligence (provided your device supports it) — so libraries, planes, and exam-day silent rooms never break your hint loop. 【Full Workflow】 Fast OCR · Study Sets (PDF / EPUB / video / audio) · direct read from Zotero / cloud drives / USB · 10 mind map styles · book recomposition · dual-document compare · concept maps · handwriting layers 【FSRS Spaced Repetition】 Built on the open-spaced-repetition project's algorithm (paper accepted by ACM SIGKDD; Anki has used FSRS as its default scheduler since v23.10). Push short-term memory into long-term. 【Built For】 Anyone re-reading a single document until it sticks — med school (USMLE / MCAT) · law school (LSAT / bar exam) · grad prep (GRE / GMAT / CFA) · researchers · language learners (IELTS / TOEFL) · serious readers. 【All Apple Platforms】 iPhone + iPad + Mac under one Apple ID. iCloud syncs Study Sets, notes, and review progress. Native Apple Pencil support on iPad. — Questions? Email service@marginnote.com Terms: https://dist.marginnote.com/MarginNote_Terms_and_Conditions.pdf Privacy: https://dist.marginnote.com/MarginNote_Privacy_Policy.pdf
FlowLog
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FlowLog is intentional time tracking for people who care about where their attention goes. Instead of turning your life into a task list, FlowLog helps you keep track of the longer directions you return to. Organize your work as Projects, Practices, and Explorations, record the time you actually give them, and reflect before deciding what comes next. WHAT YOU CAN DO • Create Threads for long-term projects, recurring practices, and open-ended explorations • Start, pause, resume, and finish focused Sessions • Add past Sessions when you forgot to start the timer • Choose up to three weekly focus Threads and set a light intention for each • Review your time across the week and month • Complete a short weekly review and carry your decisions forward • Add optional evidence or notes to remember what moved forward • Export your data whenever you want LOCAL FIRST, PRIVATE BY DESIGN FlowLog works fully on your device, including offline. iCloud sync is optional and uses your private iCloud database so your data can stay up to date across your Apple devices. There is no shared FlowLog account and no advertising. QUIET BY DEFAULT FlowLog avoids streaks, rankings, productivity scores, and guilt-driven reminders. Notifications are optional and support intentions you have already chosen. Time is context, not a score. See what happened, reflect on it, and choose what deserves your time next.
Screenshots
Verdict
The clearest difference is in-app purchases: FlowLog at none against MarginNote 4's 13. FlowLog also leads on update cadence (every 2 days vs every 3 weeks). MarginNote 4's advantage is device support (3 vs 1). On price, ads 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. MarginNote 4 sells 12 in-app purchases, starting at $1.99 per month. FlowLog asks for nothing beyond the download.
MarginNote 4 ships an update every 3 weeks, FlowLog every 2 days. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.
| Parameter | MarginNote 4 | FlowLog |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (716 ratings) — better | — |
| Positive reviews | 58.5% of reviews | — |
| Number of ratings | 716 — better | — |
| Update frequency | Every 3 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 330 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing Yunsi Software Technology Co., Ltd | HAO YU |
Bugs and requests
MarginNote 4
Reported bugs
3 issues- Disappearing annotations when using extend function
- Inability to restore accidentally deleted mind maps
- Inconsistent behavior with PDF file management
Requested features
4 requests- Improved iCloud/cloud sync reliability
- More intuitive and user-friendly interface
- Better support for external document libraries
- Ability to disable auto-excerpt selection
FlowLog
Not enough reviews yet to summarise bugs or requests.
In-app purchases
MarginNote 4
- Subscription to MAX (Monthly)7 Days trial$1.991 Month
- Subscription to MAX (3 months)7 Days trial$4.993 Months
- Subscription to MAX (6 months)7 Days trial$7.996 Months
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- Subscription to MAX (Annually)1 Month trial$12.991 Year
- MarginNote Max Annual1 Month trial$16.991 Year
- 14 days Free Trial2 variantsFree
- Upgrade to PRO from MN3(iOS)$4.99
- Unlock PRO Forever (New)$12.99
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- Upgrade to MAX from MN3(macOS)$19.99
- Unlock MAX based on PRO$39.99
- Unlock MAX based on PRO (New)$40.00
- Unlock MAX Forever (New)$51.99
FlowLog
No in-app purchases








