# Formbook vs K9 Smart Rings

The clearest difference is in-app purchases: K9 Smart Rings at none against Formbook's 2. K9 Smart Rings also leads on iOS requirement (15.1 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Formbook sells 2 one-off in-app purchases. K9 Smart Rings asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on October 22, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Formbook | K9 Smart Rings |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (32 ratings)](https://appshunter.io/ios/app/formbook/id1570038338/reviews)** | — |
| Number of ratings | **32** | — |
| Positive reviews | 79.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 35 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mathieu Morgensztern](https://appshunter.io/developer/1439918443) | [Simon Prins ACT](https://appshunter.io/developer/1891966426) |

## What reviewers say

### Formbook

[App page](https://appshunter.io/ios/app/formbook/id1570038338)

This app allows you to create structured notes that function like database forms, saving you time and providing instant chart statistics. It supports collaboration, cross-device synchronization, and AI-powered form building with numerous field types.

**Highlights:** Form-based note creation, Instant chart statistics, Notebook sharing for collaboration, AI-powered automated form builder, 30+ form field types, Cross-device synchronization, Export to PDF and CSV

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Notebook sharing | $3.99 | one-time |
| Additional fields pack | $3.99 | one-time |

**What reviewers like**

- 👍 Intuitive and easy-to-use interface
- 🔄 Seamless cross-device synchronization
- 💰 One-time purchase with no subscription
- 🎨 Clean, native Apple design aesthetic
- 📊 Flexible field types and customization

**What reviewers complain about**

- 🔍 Limited search functionality (no field-specific search)
- 🐛 Frequent crashes on macOS
- ⚠️ Slow performance with large datasets
- 📋 No table/spreadsheet view option
- 🔐 Lack of password protection

**Reported bugs**

- Crashes on macOS Ventura and newer
- Crashes when validating fields in new notes
- Export functionality issues with CSV and PDF
- Barcode field scans but cannot search by barcode
- Star rating field too sensitive to accidental changes

**Requested features**

- Field-specific search functionality
- Advanced multi-criteria filtering
- Table/spreadsheet view for data
- Password/biometric app protection
- Rich text formatting (bold, italic, colors)


### K9 Smart Rings

[App page](https://appshunter.io/ios/app/k9-smart-rings/id6762005957)

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

**In-app purchases:** none


## Frequently asked questions

### Is Formbook free?

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

### Is K9 Smart Rings free?

K9 Smart Rings is free to download, with no in-app purchases.

### Do Formbook or K9 Smart Rings have ads?

Neither Formbook nor K9 Smart Rings shows ads.

### Which is updated more often, Formbook or K9 Smart Rings?

Formbook ships an update every 4 days, and K9 Smart Rings every 4 days. Most recently, Formbook was updated on October 22, 2026 and K9 Smart Rings on October 7, 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.*