Inner Armor vs SpiroFit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Inner Armor
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.
- Performance training techniques
- Resilience enhancement
- Heart rate detection
- Body temperature monitoring
- Skin conductance tracking
- Respiration monitoring
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Inner Armor performance training app trains athletes to reach peak performance by allowing them to use a series of different techniques to enhance their resilience. The app integrates with TPS eVU sensor which enables detection of heart rate, body temperature, skin conductance and respiration. Disclaimer: this app and its affiliated device is NOT for medical use. Users should seek a doctor’s advice in addition to using this app and before making any medical decisions.
SpiroFit
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.
- Live respiratory rate tracking
- Live heart rate monitoring
- Tidal volume measurement
- O2 consumption tracking
- CO2 output tracking
- Professional data analysis
- Real-time training feedback
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What SpiroFit Does Whether you're at home, in the gym, running, or road cycling, SpiroFit lets you track respiratory rate, heart rate, tidal volume, O2 consumption, and CO2 output live. The professional data analysis ensures effective training at the optimal intensity level. Who Is SpiroFit For? SpiroFit offers flexible application for all sports and provides real-time feedback during training. Whether you coach athletes, professional athletes, or fitness enthusiasts, SpiroFit enables you to perform performance analyses whenever and wherever you want.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Inner Armor | SpiroFit |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (40 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 40 — better | 1 |
| Update frequency | Every 2 weeks — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 304 MB | 8 MB |
| Age rating | 17+ | 4+ |
| Developer | Inner Armor | SENDSOR GmbH |
Customer experience
Inner Armor
SpiroFit
In-app purchases
Inner Armor
No in-app purchases
SpiroFit
No in-app purchases
Questions
Is Inner Armor free?
Is SpiroFit free?
Which has better reviews, Inner Armor or SpiroFit?
Do Inner Armor or SpiroFit have ads?
Which is updated more often, Inner Armor or SpiroFit?
Other comparisons
