# MIR SMART ONE vs NxGen Spirometer

MIR SMART ONE and NxGen Spirometer are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MIR SMART ONE ships an update every 4 months, NxGen Spirometer every 7 months. The most recent releases landed on June 1, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | MIR SMART ONE | NxGen Spirometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (22 ratings)](https://appshunter.io/ios/app/mir-smart-one/id1010664940/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Free | — |
| Size | 22 MB | 55 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [MIR Medical International Research](https://appshunter.io/developer/1010662698) | [Safey Medical Devices Ltd](https://appshunter.io/developer/1551912769) |

## What reviewers say

### MIR SMART ONE

[App page](https://appshunter.io/ios/app/mir-smart-one/id1010664940)

This app works with a connected device to measure respiratory function, including FEV1 and PEF. It provides real-time feedback with a traffic light system and stores results for easy tracking and sharing. Personal health data is used solely for calculating target values.

**Highlights:** Bluetooth Peak Flow and FEV1 measurement, Real-time data transfer and animation, Traffic light health indicator, Automatic test result storage, Symptom and note logging, PDF report generation for sharing, Apple Health integration

**Features:** macOS Compatibility

**In-app purchases:** none


### NxGen Spirometer

[App page](https://appshunter.io/ios/app/nxgen-spirometer/id6737472667)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MIR SMART ONE free?

MIR SMART ONE is free to download, with no in-app purchases.

### Is NxGen Spirometer free?

NxGen Spirometer is free to download, with no in-app purchases.

### Do MIR SMART ONE or NxGen Spirometer have ads?

Neither MIR SMART ONE nor NxGen Spirometer shows ads.

### Which is updated more often, MIR SMART ONE or NxGen Spirometer?

MIR SMART ONE ships an update every 4 months, and NxGen Spirometer every 7 months. Most recently, MIR SMART ONE was updated on June 1, 2026 and NxGen Spirometer on May 17, 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.*