---
title: "FYRA : It's Simple Physics - Reviews, Revenue and Downloads in Czechia | Apple App Store"
description: "Calories are simple physics.  If you eat more than you burn, you gain weight. If you burn more than you eat, you lose weight.  Fyra is built around that one equation — and nothing else.  Fyra tracks c"
---

# FYRA : It's Simple Physics — Czechia
> In − Out = Weight

![FYRA App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/9a/bc/71/9abc7134-6320-b3d4-2efb-a9dfdfccffbe/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [Joseph Raymond](https://apptail.io/developer/joseph-raymond-tvBub)
**Category:** Health Fitness
**Rating:** N/A (0 ratings)
**Price:** Free
**Bundle ID:** com.fyra.Fyra
**Store:** Apple App Store
**Country:** Czechia
**Version:** 1.0 (released 2026-01-12)
**Original Release:** 2026-01-12
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/cz/app/app/id6757571544)
**AppTail Page:** [https://apptail.io/app/fyra-its-simple-physics-cjJy/czechia](https://apptail.io/app/fyra-its-simple-physics-cjJy/czechia)

## FYRA Description
Calories are simple physics.

If you eat more than you burn, you gain weight.
If you burn more than you eat, you lose weight.

Fyra is built around that one equation — and nothing else.

Fyra tracks calories consumed and calories burned, then shows you the net result. From that, it predicts weight change and displays clear trends over time. No guesses, no motivation tricks, just math.

Fyra deliberately avoids what most calorie apps add.

There is no AI coaching.
There are no meal plans.
There are no challenges, streaks, or guilt-driven nudges.

Fyra is a tool, not a lifestyle brand.

The app integrates natively with Apple Health to sync activity and weight data automatically. You can log food using barcode scanning, search, or manual entry. Activities can be added manually when needed. Everything is designed to answer one question clearly and quickly: what is my calorie balance, and what does it mean?

Fyra is built for people who already understand calories. It is for users who are tired of bloated fitness apps, constant upsells, and artificial encouragement. If you believe weight change comes down to calories in versus calories out, Fyra will feel refreshingly honest.

You are not paying for AI hype or coaching scripts.
You are paying for a clean, reliable tool that respects your intelligence.

Calories in. Calories out. Nothing else.

Privacy Policy: 
Terms of Service: 

## FYRA Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/59/e7/3b/59e73bde-522b-009d-987a-fc6c0cefdb9b/IMG_1567.PNG/1320x2868.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/38/a4/c8/38a4c8d3-c86d-0a99-8a80-8b202db0b8f8/IMG_1568.PNG/1320x2868.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c1/26/46/c1264686-5907-d602-c559-7efa67fbe5a4/IMG_1569.PNG/1320x2868.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/07/3b/a7/073ba797-3da3-d2de-f9d9-fa3837c7ab66/IMG_1563.PNG/1320x2868.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/1b/f2/9e/1bf29e4d-f51c-256b-919b-a5475607e0b8/IMG_1564.PNG/1320x2868.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/98/4d/70/984d701d-7f1c-8d2b-4ec3-bf714426a16f/IMG_1565.PNG/1320x2868.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/49/b0/54/49b05434-8241-e582-9332-83baf7a8ee09/IMG_1566.PNG/1320x2868.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/8b/1b/ea/8b1bea17-f0b6-a9a9-e329-ee85b5bcadae/IMG_1570.PNG/1320x2868.png)



## FYRA In-App Purchases
| Item | Price |
|------|-------|
| Fyra Premium | 49.00 č |




## FYRA Available In
- [Czechia](https://apptail.io/app/fyra-its-simple-physics-cjJy/czechia)
- [Romania](https://apptail.io/app/fyra-its-simple-physics-cjJy/romania)

---

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