# Inner Armor vs SpiroFit

The clearest difference is ratings volume: Inner Armor at 40 against SpiroFit's 1. Inner Armor also leads on iOS requirement (15.1 vs 17.6). On price, rating, review sentiment and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Inner Armor against 5.0 for SpiroFit. That said, the two scores are not equally well evidenced: Inner Armor has 40 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Inner Armor ships an update every 2 weeks, SpiroFit every 3 weeks. The most recent releases landed on August 19, 2026 and August 25, 2026 respectively.

## The numbers

| Metric | Inner Armor | SpiroFit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (40 ratings)](https://appshunter.io/ios/app/inner-armor/id6471288699/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/spirofit/id6475291331/reviews) |
| Number of ratings | **40** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 304 MB | 8 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Inner Armor](https://appshunter.io/developer/1715033393) | [SENDSOR GmbH](https://appshunter.io/developer/1723823291) |

## What reviewers say

### Inner Armor

[App page](https://appshunter.io/ios/app/inner-armor/id6471288699)

Enhance athletic resilience and reach peak performance with advanced training techniques. This app integrates with a sensor to track key physiological metrics like heart rate and body temperature. It is designed for training purposes and not for medical use.

**Highlights:** Performance training techniques, Resilience enhancement, Heart rate detection, Body temperature monitoring, Skin conductance tracking, Respiration monitoring

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

**In-app purchases:** none


### SpiroFit

[App page](https://appshunter.io/ios/app/spirofit/id6475291331)

Track key respiratory and heart metrics live during workouts like running or cycling. Analyze professional data for optimal training intensity. Suitable for coaches, professional athletes, and fitness enthusiasts.

**Highlights:** Live respiratory rate tracking, Live heart rate monitoring, Tidal volume measurement, O2 consumption tracking, CO2 output tracking, Professional data analysis, Real-time training feedback

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

**In-app purchases:** none


## Frequently asked questions

### Is Inner Armor free?

Inner Armor is free to download, with no in-app purchases.

### Is SpiroFit free?

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

### Which has better reviews, Inner Armor or SpiroFit?

Inner Armor and SpiroFit are both rated 5.0 out of 5 on the App Store, from 40 and 1 ratings respectively.

### Do Inner Armor or SpiroFit have ads?

Neither Inner Armor nor SpiroFit shows ads.

### Which is updated more often, Inner Armor or SpiroFit?

Inner Armor ships an update every 2 weeks, and SpiroFit every 3 weeks. Most recently, Inner Armor was updated on August 19, 2026 and SpiroFit on August 25, 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.*