# WriterDuet vs BIFF

The clearest difference is in-app purchases: WriterDuet at none against BIFF's 2. WriterDuet also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. BIFF sells 2 in-app purchases, starting at $4.99 per month. WriterDuet asks for nothing beyond the download.

WriterDuet ships an update every 2 months, BIFF every 5 weeks. The most recent releases landed on October 17, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | WriterDuet | BIFF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (72 ratings)](https://appshunter.io/ios/app/writerduet/id1237820649/reviews)** | — |
| Number of ratings | **72** | — |
| Positive reviews | 37.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 249 MB | 34 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 9+ |
| Developer | [WriterDuet Inc.](https://appshunter.io/developer/1237820648) | [Shawarma Mia Corp](https://appshunter.io/developer/1725002082) |

## What reviewers say

### WriterDuet

[App page](https://appshunter.io/ios/app/writerduet/id1237820649)

This intuitive screenwriting software offers real-time collaboration and powerful features for writers on the go. Its user-friendly interface allows for instant writing, with robust tools for outlining, reporting, and revision management. Secure and industry-standard, it ensures your work is always saved and accessible.

**Highlights:** Real-time collaboration, Offline mode, Card outliner, Revision drafts, Automatic statistics, Export from any point

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Intuitive and easy to use
- 👍 Convenient cross-device sync and collaboration
- 🚀 Efficient formatting and layout
- 👍 Great for beginners and professionals
- 👍 Helpful customer support

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🐛 Syncing and formatting issues
- 🐛 Unreliable performance on mobile devices
- 💰 Expensive subscription model
- 🔒 Concerns about data security and account access

**Reported bugs**

- Freezing on login screen
- Disappearing text and formatting errors
- Inability to access or export projects
- Compatibility issues with newer devices
- Inconsistent behavior across platforms

**Requested features**

- Offline mode support
- Improved mobile app optimization
- More customization options
- Better integration with other writing tools
- Expanded template and formatting options


### BIFF

[App page](https://appshunter.io/ios/app/biff-planner/id6760688803)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BIFF Plus Monthly | $4.99 | per month |
| BIFF Plus Yearly | $19.99 | per year |


## Frequently asked questions

### Is WriterDuet free?

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

### Is BIFF free?

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

### Do WriterDuet or BIFF have ads?

Neither WriterDuet nor BIFF shows ads.

### Which is updated more often, WriterDuet or BIFF?

WriterDuet ships an update every 2 months, and BIFF every 5 weeks. Most recently, WriterDuet was updated on October 17, 2026 and BIFF on September 27, 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.*