Comparison

Flutter vs FormSight

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

Head to head
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/

About

FormSight

Features
Read full description

FormSight is a coaching tool for personal trainers, strength coaches, and movement specialists. Record a client's set, see a live skeleton overlay with joint angles and rep-by-rep form grades, then review the session with frame-by-frame playback, annotation, and looping. WHAT IT DOES • Live skeleton overlay with joint angles during recording • Rep counting with green, yellow, and red form grades • Eight movement quality checks including knee valgus, hip shift, forward lean, and back rounding • Side-by-side comparison of two sessions • Frame-by-frame review with drawing, annotation, and looping • Per-client roster with session history, trend charts, and quality scores • Branded PDF reports for client check-ins • Still frame capture and video export to Photos • Fully on-device processing — no internet required, no account, no data leaves your device SUPPORTED EXERCISES Squat (front view and side view), Romanian deadlift, stiff-leg deadlift, and good morning. Each exercise activates the movement quality checks that apply to its pattern. SUBSCRIPTION FormSight Coach starts with a 14-day free trial. After the trial, continue at $9.99 per month or $99 per year. Subscriptions auto-renew through your Apple ID unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Apple ID Settings. PRIVACY All client data, recordings, session notes, and PDF exports stay on your device. FormSight has no analytics, no account creation, and sends no data to a server. FormSight is a coaching and observation tool. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any injury, illness, or condition.

Screenshots

Flutter4 screens
FormSight4 screens

Verdict

The call

Flutter and FormSight are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 and FormSight sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flutter ships an update every 3 weeks, FormSight monthly. The most recent releases landed on September 22, 2026 and September 24, 2026 respectively.

ScorecardNo meaningful differences
Flutter versus FormSight: the parameters behind the verdict, then further details
ParameterFlutterFormSight
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS17.617.0 — better
Further details — not scored
Size21 MB8 MB
Age rating4+4+
DeveloperCYBERIAN TECHNOLOGIES LLCBig Creek Holdings LLC

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
2 purchases

FormSight

Subscriptions2
  • FormSight Coach (Monthly)14 Days trial$9.991 Month
  • FormSight Coach Annual14 Days trial$99.991 Year

Questions

Is Flutter free?
Flutter is free to download, with in-app purchases available.
Is FormSight free?
FormSight is free to download, with in-app purchases available.
Do Flutter or FormSight have ads?
Neither Flutter nor FormSight shows ads.
Which is updated more often, Flutter or FormSight?
Flutter ships an update every 3 weeks, and FormSight monthly. Most recently, Flutter was updated on September 22, 2026 and FormSight on September 24, 2026.

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