# How To Use Inhaler vs STI Tx Guide

The clearest difference is rating: STI Tx Guide at 3.5 against How To Use Inhaler's 2.2. STI Tx Guide also leads on in-app purchases (none vs 4) and ratings volume (36 vs 6). How To Use Inhaler's advantage is update cadence (every 5 weeks vs every 8 months) and device support (3 vs 1). On price, review sentiment and ads there is nothing between them.

Both are free to download. How To Use Inhaler sells 4 one-off in-app purchases. STI Tx Guide asks for nothing beyond the download.

STI Tx Guide holds the better App Store score, 3.5 against 2.2. That said, the two scores are not equally well evidenced: STI Tx Guide has 36 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 38% of How To Use Inhaler's written reviews are positive against 36% of STI Tx Guide's, so the app with the better star average is not the one people write more warmly about.

How To Use Inhaler ships an update every 5 weeks, STI Tx Guide every 8 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | How To Use Inhaler | STI Tx Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (6 ratings)](https://appshunter.io/ios/app/how-to-use-inhaler/id581502355/reviews) | **[3.5 (36 ratings)](https://appshunter.io/ios/app/sti-tx-guide/id655206856/reviews)** |
| Number of ratings | 6 | **36** |
| Positive reviews | **37.5% of reviews** | 35.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 8 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 17 MB | 31 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Smart Mirror LLC](https://appshunter.io/developer/401634888) | [Centers For Disease Control and Prevention](https://appshunter.io/developer/439259253) |

## What reviewers say

### How To Use Inhaler

[App page](https://appshunter.io/ios/app/how-to-use-inhaler/id581502355)

This app provides interactive audio-visual guides for using various inhaler devices correctly. It offers 3D animations, step-by-step instructions, and practice modules to help patients with Asthma and COPD manage their respiratory treatment effectively. Available in multiple languages.

**Highlights:** Interactive audio-visual demonstrations, 3D animated 360-degree view of inhalers, Step-by-step usage instructions, Practice module with visual feedback, Audio-visual knowledge quiz, Supports 12+ inhaler types, Available in English, Spanish, Portuguese, Polish

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 Views | $4.99 | one-time |
| Get 50 Views | $9.99 | one-time |
| 250  Views | $19.99 | one-time |
| Get 250  Views | $39.99 | one-time |


### STI Tx Guide

[App page](https://appshunter.io/ios/app/sti-tx-guide/id655206856)

Provides healthcare professionals with up-to-date, evidence-based recommendations for the prevention, diagnosis, and treatment of sexually transmitted infections. Features include clinical care guidance, sexual history resources, and patient materials.

**Highlights:** STI prevention recommendations, Diagnosis guidance, Treatment protocols, Clinical care assistance, Sexual history resources, Patient management tools

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

**In-app purchases:** none


## Frequently asked questions

### Is How To Use Inhaler free?

How To Use Inhaler is free to download, with in-app purchases available.

### Is STI Tx Guide free?

STI Tx Guide is free to download, with no in-app purchases.

### Which has better reviews, How To Use Inhaler or STI Tx Guide?

STI Tx Guide is rated higher. How To Use Inhaler averages 2.2 out of 5 from 6 ratings, while STI Tx Guide averages 3.5 from 36 ratings.

### Do How To Use Inhaler or STI Tx Guide have ads?

Neither How To Use Inhaler nor STI Tx Guide shows ads.

### Which is updated more often, How To Use Inhaler or STI Tx Guide?

How To Use Inhaler ships an update every 5 weeks, and STI Tx Guide every 8 months. Most recently, How To Use Inhaler was updated on November 1, 2026 and STI Tx Guide on November 3, 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.*