Comparison

Smooth Breath vs Flutter

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

Head to head
About

Smooth Breath

Features
Read full description

A visual cue for smooth, deep breathing. Breathe in as the bar rises and out as it falls. Adjust the rhythm as desired.

About

Flutter

Experience your heartbeat as a live haptic sensation on your wrist. Connect with loved ones by sharing real-time heartbeats, fostering a sense of presence and intimacy across any distance. Choose from various haptic styles for a personalized and calming experience.

Highlights
  • Live haptic heartbeat feedback on Apple Watch
  • Solo Sync for personal awareness
  • Partner Sync for sharing with others
  • Real-time BPM display
  • Multiple haptic pulse styles
  • Invite-based partner pairing
Features
Read full description

Flutter lets you feel a heartbeat directly on your wrist through Apple Watch. Designed for calm, focused awareness, Flutter turns heartbeat into a live haptic experience you can physically feel in real time. During a session, Flutter reads heart rate, displays BPM clearly, and translates each beat into a precise pulse on your wrist. Different haptic styles let you choose the sensation that feels most comfortable or meaningful. Flutter includes Solo Sync for personal heartbeat awareness and Partner Sync for sharing live heartbeats with someone you care about. Couples, friends, and family can connect through invite-based sessions and experience real-time heartbeats together, creating a simple and intimate way to stay connected across any distance. Sessions are easy to start and stop, with a minimal interface designed to stay out of the way and keep attention on rhythm, presence, and connection. Features • Solo Sync for personal heartbeat awareness • Partner Sync for sharing live heartbeats with another person • Real-time heart rate (BPM) display • Live haptic heartbeat feedback on Apple Watch • Multiple haptic pulse styles • Invite-based partner pairing • Minimal, distraction-free interface • Account deletion from the Profile screen Flutter is a quiet, modern way to feel rhythm, presence, and connection. • Privacy Policy: https://flutter.cyberian.tech/privacy.html • Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Smooth Breath2 screens
Flutter4 screens

Verdict

The call

The clearest difference is in-app purchases: Smooth Breath at none against Flutter's 3. Flutter's advantage is update cadence (every 3 weeks vs every 60 months). On price, ads, device support and iOS requirement 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. Flutter sells 3 in-app purchases, starting at $14.99 per month. Smooth Breath asks for nothing beyond the download.

UpkeepUpdate frequency

Smooth Breath ships an update every 60 months, Flutter every 3 weeks. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 8 level
Smooth Breath versus Flutter: the parameters behind the verdict, then further details
ParameterSmooth BreathFlutter
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 60 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Subscription
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS17.617.6
Further details — not scored
Size0 MB21 MB
Age rating4+4+
DeveloperKoral Oztan SchemelCYBERIAN TECHNOLOGIES LLC

In-app purchases

None

Smooth Breath

No in-app purchases

3 purchases

Flutter

Subscriptions3
  • Partner Sync (Monthly)7 Days trial$14.991 Month
  • Partner Sync Quarterly7 Days trial$39.993 Months
  • Partner Sync Annual7 Days trial$119.991 Year

Questions

Is Smooth Breath free?
Smooth Breath is free to download, with no in-app purchases.
Is Flutter free?
Flutter is free to download, with in-app purchases available.
Do Smooth Breath or Flutter have ads?
Neither Smooth Breath nor Flutter shows ads.
Which is updated more often, Smooth Breath or Flutter?
Smooth Breath ships an update every 60 months, and Flutter every 3 weeks. Most recently, Smooth Breath was updated on October 7, 2026 and Flutter on October 9, 2026.

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