# SFD vs INK.BOOK

The clearest difference is in-app purchases: INK.BOOK at none against SFD's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SFD sells 1 one-off in-app purchase. INK.BOOK asks for nothing beyond the download.

SFD ships an update every 8 days, INK.BOOK every 11 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SFD | INK.BOOK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sfd-write-it-bad/id6778871291/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 11 days |
| Monetization | Paid | — |
| Size | 3 MB | 9 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Daniel James Kinney-Spears](https://appshunter.io/developer/6778614359) | [Yahya Gonder](https://appshunter.io/developer/6810389958) |

## What reviewers say

### SFD

[App page](https://appshunter.io/ios/app/sfd-write-it-bad/id6778871291)

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:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SFD Habit Tracking | $0.99 | one-time |


### INK.BOOK

[App page](https://appshunter.io/ios/app/inkbook-write-your-book/id6811605578)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SFD free?

SFD is free to download, with in-app purchases available.

### Is INK.BOOK free?

INK.BOOK is free to download, with no in-app purchases.

### Do SFD or INK.BOOK have ads?

Neither SFD nor INK.BOOK shows ads.

### Which is updated more often, SFD or INK.BOOK?

SFD ships an update every 8 days, and INK.BOOK every 11 days. Most recently, SFD was updated on October 25, 2026 and INK.BOOK on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*