Comparison

Zygo vs SFS App

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

Head to head
About

Zygo

Access over 500 guided swim workouts paired with music. Track your progress with lap counting and a tempo trainer. Stay connected with walkie-talkie functionality and manage device settings.

Highlights
  • 500+ guided swim workouts
  • Music integration
  • Lap counting
  • Tempo trainer
  • Walkie-talkie feature
  • Battery level monitoring
  • Firmware updates
Read full description

Make the most of your Zygo with our app. In addition to a library of over 500 guided swim workouts paired to music, our app shows your battery levels and counts your laps, and has a tempo trainer and walkie-talkie. It also enables firmware updates for ongoing feature additions and enhancements.

About

SFS App

Features
Read full description

SFS (StraightForward Smiles) is a modern dental-care application designed to help patients easily manage their oral health, book appointments, access treatment history, receive important reminders, and stay connected with their dentist through a smooth and user-friendly experience. The app brings your entire dental journey into one place, offering secure access to your medical records, diagnosis details, prescriptions, past visits, and progress tracking. With its simple interface and strong privacy protection, SFS ensures that your personal health information remains safe at all times. Real-time notifications, personalized dental-care tips, and follow-up reminders help you stay consistent with your treatment and maintain a healthier smile. SFS aims to make dental care simple, transparent, and accessible for everyone, allowing every patient to confidently track and improve their dental wellness.

Screenshots

Zygo4 screens
SFS App4 screens

Verdict

The call

The clearest difference is in-app purchases: SFS App at none against Zygo's 2. SFS App also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.6). On price, update cadence and ads 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. Zygo sells 2 in-app purchases, starting at $4.99 per month. SFS App asks for nothing beyond the download.

UpkeepUpdate frequency

Zygo ships an update every 2 months, SFS App every 3 months. The most recent releases landed on October 11, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Zygo versus SFS App: the parameters behind the verdict, then further details
ParameterZygoSFS App
PriceFreeFree
Rating4.3 (123 ratings) — better—
Positive reviews42.9% of reviews—
Number of ratings123 — better—
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.613.0 — better
Further details — not scored
Size100 MB24 MB
Age rating4+4+
DeveloperSwimmersive CoDEVBUNCH (PRIVATE) LIMITED

In-app purchases

2 purchases

Zygo

Subscriptions2
  • Monthly Subscription14 Days trial$4.991 Month
  • Yearly Subscription14 Days trial$49.991 Year
None

SFS App

No in-app purchases

Questions

Is Zygo free?
Zygo is free to download, with in-app purchases available.
Is SFS App free?
SFS App is free to download, with no in-app purchases.
Do Zygo or SFS App have ads?
Neither Zygo nor SFS App shows ads.
Which is updated more often, Zygo or SFS App?
Zygo ships an update every 2 months, and SFS App every 3 months. Most recently, Zygo was updated on October 11, 2026 and SFS App on October 6, 2026.

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