# iSecure Master vs RadonSketch

The clearest difference is review sentiment: RadonSketch at 100% against iSecure Master's 0%. RadonSketch also leads on rating (5.0 vs 1.0) and ratings volume (3 vs 1). iSecure Master's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RadonSketch sells 2 in-app purchases, starting at $49.00 per month. iSecure Master asks for nothing beyond the download.

RadonSketch holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 0% of iSecure Master's written reviews are positive against 100% of RadonSketch's.

iSecure Master ships an update every 6 weeks, RadonSketch every 4 weeks. The most recent releases landed on September 8, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | iSecure Master | RadonSketch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/isecure-master/id1444971049/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/radonsketch/id6751263976/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 weeks** |
| Monetization | **Free** | Freemium |
| Size | 60 MB | 67 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sunprotected Technology Corp](https://appshunter.io/developer/1691029358) | [Chad Smith](https://appshunter.io/developer/1840658074) |

## What reviewers say

### iSecure Master

[App page](https://appshunter.io/ios/app/isecure-master/id1444971049)

This app transforms your iPhone into a secure vault for photos and videos, protecting your content from illegal copying. It offers encrypted photography, secure data transfer, and a personal note tool for enhanced privacy.

**Highlights:** Encrypted photography, Secure photo and video transfer, Personal account and password notes, Data transfer and auto backup, Secure voice memos, Secure notes

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is iSecure Master free?

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

### Is RadonSketch free?

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

### Which has better reviews, iSecure Master or RadonSketch?

RadonSketch is rated higher. iSecure Master averages 1.0 out of 5 from 1 ratings, while RadonSketch averages 5.0 from 3 ratings.

### Do iSecure Master or RadonSketch have ads?

Neither iSecure Master nor RadonSketch shows ads.

### Which is updated more often, iSecure Master or RadonSketch?

iSecure Master ships an update every 6 weeks, and RadonSketch every 4 weeks. Most recently, iSecure Master was updated on September 8, 2026 and RadonSketch on September 16, 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.*