Comparison

BodyFix.io vs Principle Guy

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

BodyFix.io

Features

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Aplikácia, ktorá vám pomôže udržať Váš chrbát zdravý. Starostlivo vybrané cviky pre váš chrbát vhodné na cvičenie aj v domácom prostredí. Všetky Vaše tréningy si môžete spätne pozrieť na karte "Moja Aktivita".

About

Principle Guy

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Osobný tréner v tvojom mobile.

Screenshots

BodyFix.io3 screens

Principle Guy4 screens

Verdict

The call

The clearest difference is in-app purchases: Principle Guy at none against BodyFix.io's 1. Principle Guy also leads on update cadence (every 2 days vs fortnightly). BodyFix.io's advantage is iOS requirement (13.0 vs 15.5). On price, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BodyFix.io sells 1 one-off in-app purchase. Principle Guy asks for nothing beyond the download.

UpkeepUpdate frequency

BodyFix.io ships an update fortnightly, Principle Guy every 2 days. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

Scorecard3 real differences · 3 level

BodyFix.io versus Principle Guy: the parameters behind the verdict, then further details
Parameter	BodyFix.io	Principle Guy
Price	Free	Free
Update frequency	Fortnightly	Every 2 days — better
Ads	No	No
In-app purchases	Yes	No — better
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	13.0 — better	15.5
Further details — not scored
Size	80 MB	88 MB
Age rating	17+	4+
Developer	BodyFix Technologies s.r.o.	ERIK GARAJ

In-app purchases

1 purchases

BodyFix.io

One-time1

Protetika Zdravé nôžky$2.99

None

Principle Guy

No in-app purchases

Questions

Is BodyFix.io free?

BodyFix.io is free to download, with in-app purchases available.

Is Principle Guy free?

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

Do BodyFix.io or Principle Guy have ads?

Neither BodyFix.io nor Principle Guy shows ads.

Which is updated more often, BodyFix.io or Principle Guy?

BodyFix.io ships an update fortnightly, and Principle Guy every 2 days. Most recently, BodyFix.io was updated on October 6, 2026 and Principle Guy on October 14, 2026.