Comparison

SFD vs Humanize AI

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

Head to head
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.

About

Humanize AI

Features
Read full description

Humanize AI: Rewrite & Detect helps transform robotic or AI-generated text into natural, clear, and engaging writing. Paste your text or import content from a photo, PDF, or document. Choose a writing style and create a polished version that better matches your purpose and audience. KEY FEATURES • Humanize AI-generated text • Rewrite text naturally while preserving its meaning • Choose General, Academic, Blog, Formal, or Informal writing styles • Check AI and human probability with clear results • Scan text for potential plagiarism and review matching sources • Import text from photos using text recognition • Upload PDFs and supported documents • Copy and share results quickly • Use the app for essays, emails, articles, captions, reports, and more WRITING FOR EVERY PURPOSE Whether you are preparing an academic paper, professional email, blog post, or everyday message, Humanize AI helps make your writing clearer, smoother, and easier to read. UNDERSTAND YOUR RESULTS AI detection results clearly show both AI and human probability, helping you understand how your text may be interpreted. Detection results are estimates and should not be treated as definitive proof of authorship. Humanize your writing, review originality, and communicate with confidence—all in one app. Some features may require a Pro subscription. Terms: https://humanizer-mobile-c5f6b.web.app/terms Privacy: https://humanizer-mobile-c5f6b.web.app/privacy

Screenshots

SFD4 screens
Humanize AI4 screens

Verdict

The call

The clearest difference is iOS requirement: Humanize AI at 15.5 against SFD's 17.0. On price, ads, in-app purchases and 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SFD sells 1 one-off in-app purchase and Humanize AI sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
SFD versus Humanize AI: the parameters behind the verdict, then further details
ParameterSFDHumanize AI
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 8 days—
AdsNoNo
In-app purchasesYesYes
MonetizationPaid—
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS17.015.5 — better
Further details — not scored
Size3 MB89 MB
Age rating4+4+
DeveloperDaniel James Kinney-SpearsCHAKO LTD

In-app purchases

1 purchases

SFD

One-time1
  • SFD Habit Tracking$0.99
2 purchases

Humanize AI

Subscriptions2
  • Pro Monthly3 Days trial$8.991 Month
  • Pro Yearly3 Days trial$39.991 Year

Questions

Is SFD free?
SFD is free to download, with in-app purchases available.
Is Humanize AI free?
Humanize AI is free to download, with in-app purchases available.
Do SFD or Humanize AI have ads?
Neither SFD nor Humanize AI shows ads.

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