# FeNO Learn by NIOX® vs Tomescroll

The clearest difference is in-app purchases: FeNO Learn by NIOX® at none against Tomescroll's 2. FeNO Learn by NIOX® also leads on iOS requirement (12.0 vs 15.0). Tomescroll's advantage is ads (none vs shown) and update cadence (every 8 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Tomescroll sells 2 in-app purchases, starting at $2.99 per month. FeNO Learn by NIOX® asks for nothing beyond the download.

FeNO Learn by NIOX® ships an update every 2 months, Tomescroll every 8 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | FeNO Learn by NIOX® | Tomescroll |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/feno-learn-by-niox/id1673279639/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | Ad-supported | — |
| Size | 21 MB | 51 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [NIOX Group PLC](https://appshunter.io/developer/1673279641) | [Callum Cameron](https://appshunter.io/developer/1896427535) |

## What reviewers say

### FeNO Learn by NIOX®

[App page](https://appshunter.io/ios/app/feno-learn-by-niox/id1673279639)

This app provides healthcare professionals with in-depth educational modules on fractional exhaled nitric oxide (FeNO) testing and interpretation. It offers case studies and resources to enhance asthma care and clinical decision-making.

**Highlights:** In-depth FeNO testing insights, Advanced learning modules, Clinical integration guidance, Real-world case studies, Curated respiratory health resources

**Features:** macOS Compatibility

**In-app purchases:** none


### Tomescroll

[App page](https://appshunter.io/ios/app/tomescroll-learn-by-scrolling/id6767216991)

**Features:** iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tomescroll Premium (monthly) | $2.99 | per month |
| Tomescroll Premium (yearly) | $24.99 | per year |


## Frequently asked questions

### Is FeNO Learn by NIOX® free?

FeNO Learn by NIOX® is free to download, with no in-app purchases.

### Is Tomescroll free?

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

### Do FeNO Learn by NIOX® or Tomescroll have ads?

FeNO Learn by NIOX® shows ads; Tomescroll does not.

### Which is updated more often, FeNO Learn by NIOX® or Tomescroll?

FeNO Learn by NIOX® ships an update every 2 months, and Tomescroll every 8 days. Most recently, FeNO Learn by NIOX® was updated on November 3, 2026 and Tomescroll on October 31, 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.*