# RadonSketch vs FormFlow for Google Forms

The clearest difference is update cadence: FormFlow for Google Forms at every 2 weeks against RadonSketch's monthly. RadonSketch's advantage is iOS requirement (15.6 vs 26.2). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. RadonSketch sells 2 in-app purchases, starting at $49.00 per month and FormFlow for Google Forms sells 3 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for RadonSketch against 5.0 for FormFlow for Google Forms. Both are backed by a comparable volume of ratings — 3 and 7 respectively.

RadonSketch ships an update monthly, FormFlow for Google Forms every 2 weeks. The most recent releases landed on October 30, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | RadonSketch | FormFlow for Google Forms |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/radonsketch/id6751263976/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/formflow-for-google-forms/id6782955766/reviews) |
| Number of ratings | 3 | **7** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Freemium | Freemium |
| Size | 67 MB | 45 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chad Smith](https://appshunter.io/developer/1840658074) | [PocketCraft OU](https://appshunter.io/developer/6776620336) |

## What reviewers say

### RadonSketch

[App page](https://appshunter.io/ios/app/radonsketch/id6751263976)

This tool simplifies radon mitigation workflows by helping professionals design systems, ensure compliance, and generate professional documentation. It streamlines the creation of diagrams, materials lists, and maintenance plans, saving time and reducing errors in the field.

**Highlights:** System Diagram Creator, Compliance Validation, Materials List Generator, OM&M Plan Creation, Secure Recordkeeping, Customizable for Every Job

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $49.00 | per month |
| Pro Annual | $490.00 | per year |


### FormFlow for Google Forms

[App page](https://appshunter.io/ios/app/formflow-for-google-forms/id6782955766)

Create, edit, and manage forms, surveys, and quizzes directly on your mobile device. Build from scratch or use templates, then track responses and view analytics in real-time. Seamlessly integrates with Google Workspace tools.

**Highlights:** Full-featured form builder, Pre-built templates, Real-time response tracking, Summary charts and analytics, Export and share responses, Google Workspace integration

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly  FormFlow Pro | $9.99 | per 7 days |
| Yearly FormFlow Pro | $69.99 | per year |
| Yearly FormFlow Pro | $69.99 | per year |


## Frequently asked questions

### Is RadonSketch free?

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

### Is FormFlow for Google Forms free?

FormFlow for Google Forms is free to download, with in-app purchases available.

### Which has better reviews, RadonSketch or FormFlow for Google Forms?

RadonSketch and FormFlow for Google Forms are both rated 5.0 out of 5 on the App Store, from 3 and 7 ratings respectively.

### Do RadonSketch or FormFlow for Google Forms have ads?

Neither RadonSketch nor FormFlow for Google Forms shows ads.

### Which is updated more often, RadonSketch or FormFlow for Google Forms?

RadonSketch ships an update monthly, and FormFlow for Google Forms every 2 weeks. Most recently, RadonSketch was updated on October 30, 2026 and FormFlow for Google Forms on November 10, 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.*