Comparison

Bookmark Write vs SFD

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

Head to head
About

Bookmark Write

This AI-powered writing assistant helps improve your documents with advanced suggestions, grammar checks, and style edits. It remembers context and offers a user-friendly interface for seamless editing and sharing across Apple devices.

Highlights
  • Advanced AI writing suggestions
  • AI memory for context
  • Grammar and style checks
  • Clarity and coherence improvements
  • Contextual understanding
  • User-friendly interface
  • Easy document sharing
Features
Read full description

Bookmark Write is an advanced OpenAI API powered AI writing assistant designed to assist with writing and editing text documents on the iPhone and iPad. Whether you are drafting an email, writing a report, creating a script, or crafting a novel, Bookmark Write offers expert advice and edits to improve the clarity, coherence, and overall quality of your writing. Advanced AI Writing Assistant: Bookmark Write leverages powerful OpenAI API AI capabilities to provide advanced AI suggestions, rewrites, and improvements to your text, ensuring your writing is polished and professional. Advanced AI Memory: Bookmark Write has advanced AI memory for remembering recent and saved memory which can be edited with Edit Memory view and natural language commands like "Remember ..." and "Forget ...". Grammar and Style Checks: Get comprehensive grammar checks and style suggestions to ensure your writing is error-free and professionally presented. Clarity and Coherence: Improve the readability of your documents with intelligent recommendations that improve both clarity and coherence. Contextual Understanding: With advanced context awareness, Bookmark Write understands the nuances of your text and provides tailored advice that fits the specific needs of your document. User-Friendly Interface: Enjoy a sleek, intuitive interface that makes writing and editing a breeze, whether you are drafting an email, report, or novel. Easy Sharing: Effortlessly share your edited documents directly from Bookmark Write using the iPhone's share feature. Share your polished text via Messages, Mail, AirDrop, and more. Bookmark Write is more than just a writing app. It is your advanced AI writing assistant equipped with cutting-edge AI capabilities. Whether you are a student, professional writer, or business executive, Bookmark Write ensures your writing is always at its best. Bookmark Write runs on the iPhone, iPad, and MacBook. Subscription Info: Subscription is auto-renewable which means that once purchased it will be auto-renewed. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Manage your Subscription and Auto-Renewal by going to your Account Settings. Terms of Service: http://bookmark-cafe.com/terms-of-service Privacy Policy: http://bookmark-cafe.com/privacy-policy

About

SFD

This app helps you overcome writer's block by forcing you to write a first draft without the ability to edit or reread. It uses timed bursts and nudges to keep you moving forward, allowing you to flag sections for later revision.

Highlights
  • Forward-only writing
  • Timed writing bursts
  • Cursor nudges for stalls
  • Flagging sections for revision
  • Plain text export
  • Offline functionality
Features
Read full description

Writing apps help with the easy half — outlines, fonts, folders, word-count trophies. The hard half is producing a bad first version of something, and that's all SFD does. SFD is forward-only. You write in a burst, the earlier lines dim and scroll away, and you can't go back to fix them. You can't edit a draft into existence, so SFD won't let you try until it's out. How it works: — A go is a timed burst. You write. You don't reread. — Stall for a few seconds and you get a shove — a nudge that gets blunter the longer you stare at the cursor. — Hit a line you hate? Drop a later and keep moving. Your flags become a punch-list for when you revise. — A finished part is a chunk. A stack of chunks is the Pile — your whole first draft. — When it's done, send it out as plain text, to wherever you actually revise. Drafting is free. Every go, every later, every export — no account, no trial clock, no nagging. THE BIG MONTH is free too: 50,000 words of a novel's first draft between November 1 and 30. SFD shows your words today and how many a day finishes it, lights up a November calendar on every day you write, marks 10,000, 25,000 and 50,000, and gives you a BIG MONTH 2026 stamp and finisher card you can only earn that November. One thing costs money: SFD Habit Tracking, a 99-cent one-time unlock for the habit layer — the streak map and year wall, the month goal, the quiet reminder, stamps, share cards, and the home-screen widget, which carries THE BIG MONTH in November. The scoreboard, not the game. If you bought SFD back when the app itself cost money, the habit layer is yours automatically. What SFD won't do: format, outline, sync, collaborate, or write the draft for you. You write the bad version. A chunk has to get written; inside that, anything goes. Your words stay yours. Every chunk is a plain-text file on your device. No proprietary format, no servers. SFD makes no network calls at all — it can't lose your words and it can't trap them. Get the first draft out. You can make it good later, somewhere with a real keyboard.

Screenshots

Bookmark Write4 screens
SFD4 screens

Verdict

The call

The clearest difference is rating: Bookmark Write at 5.0 against SFD's 4.5. Bookmark Write also leads on monetization model (freemium vs paid) and update cadence (every 4 days vs every 8 days). On price, ratings volume, ads and in-app purchases 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. Bookmark Write sells 1 in-app purchase, starting at $8.99 per month and SFD sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Bookmark Write holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

Bookmark Write ships an update every 4 days, SFD every 8 days. The most recent releases landed on November 12, 2026 and November 13, 2026 respectively.

Scorecard3 real differences · 7 level
Bookmark Write versus SFD: the parameters behind the verdict, then further details
ParameterBookmark WriteSFD
PriceFreeFree
Rating5.0 (1 ratings) — better4.5 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings12 — better
Update frequencyEvery 4 days — betterEvery 8 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium — betterPaid
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.617.0 — better
Further details — not scored
Size2 MB3 MB
Age rating12+4+
DeveloperBookmark Cafe, Inc.Daniel James Kinney-Spears

Customer experience

Bookmark Write

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

SFD

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Bookmark Write

Subscriptions1
  • Monthly Subscription$8.991 Month
1 purchases

SFD

One-time1
  • SFD Habit Tracking$0.99

Questions

Is Bookmark Write free?
Bookmark Write is free to download, with in-app purchases available.
Is SFD free?
SFD is free to download, with in-app purchases available.
Which has better reviews, Bookmark Write or SFD?
Bookmark Write is rated higher. Bookmark Write averages 5.0 out of 5 from 1 ratings, while SFD averages 4.5 from 2 ratings.
Do Bookmark Write or SFD have ads?
Neither Bookmark Write nor SFD shows ads.
Which is updated more often, Bookmark Write or SFD?
Bookmark Write ships an update every 4 days, and SFD every 8 days. Most recently, Bookmark Write was updated on November 12, 2026 and SFD on November 13, 2026.

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