Comparison

Tennis Setup Tracker vs Kai Surf Coach

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

Head to head
About

Tennis Setup Tracker

This app helps tennis players track their rackets, string jobs, and playing hours with an intuitive interface. It features a unique Tension Lab to measure string tension using sound and a comprehensive database for equipment details.

Highlights
  • Acoustic string tension measurement
  • Racket and string database
  • Racquet garage with custom photos
  • Detailed stringing history
  • Session and match tracking
  • Light and Dark Mode UI
Features
Read full description

Welcome to a new era for your tennis setup. We have redesigned the app from the ground up to offer you an extraordinary, fluid, and incredibly intuitive visual experience. Whether you are a recreational player or a pro, tracking your frames, string jobs, and playing hours has never been this beautiful or professional. The real revolution: Tension Lab. Ever wondered if your strings have lost tension and need to be cut? Thanks to our new advanced acoustic algorithm, just make your string bed "ping" near your iPhone's microphone. Tension Lab will capture the resonance frequency (in Hz) and transform it into a precise calculation of the current dynamic tension (in Kg or Lbs). Find out in real-time when it’s the perfect moment to restring! KEY FEATURES: Stunning New Look: A completely rewritten UI with full support for Light and Dark Mode, smooth animations, and a clean, modern design. Tension Lab: Measure the residual tension of your strings in seconds using the physics of sound. No more guessing, just real data. Strings & Racquets Database: Access a massive database of racquets and strings on the market for quick, fluid, and error-proof data entry. Racquet Garage: Save your frames, add custom photos, and keep track of technical specs. Stringing History: Record every detail: string type (hybrid or full bed), gauge, knots, machine tension, and date of breakage. Session & Match Tracking: Log practices, matches, and tournaments. Enter scores, opponents, and monitor the exact life hours of every string job. Backup & Security: Export and import your data in JSON format to never lose your valuable history (Premium Feature). Take your tennis to the next level. Champions know their gear: start tracking yours today! Privacy Policy - https://racquetpassion.wordpress.com/privacy-policy-tennis-setup-tracker/ EULA - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Kai Surf Coach

Features
Read full description

KAI is the AI-powered surf coaching app that analyzes your surf sessions and helps you improve faster. Simply record your surf session, upload the video to KAI, and receive detailed AI analysis within minutes. KAI identifies your technique, evaluates your performance, and provides personalized coaching tips based on your skill level. KEY FEATURES: - AI Video Analysis — Upload surf videos and get instant technique feedback - Performance Scoring — Track progress with detailed scores across multiple performance categories - Skill Level Tracking — From Beginner to Advanced, KAI adapts coaching to your level - Session History — Review all past sessions and track your improvement over time - Progress Insights — See your evolution with detailed performance charts and trend analysis - Achievement Badges — Earn badges as you hit new milestones and skill targets HOW IT WORKS: 1. Record your surf session or upload an existing video 2. KAI's AI analyzes your technique, posture, and wave riding 3. Receive a detailed performance score and personalized coaching tips 4. Track your progress over time and see measurable improvement DESIGNED FOR ALL LEVELS: Whether you're just starting out or looking to compete, KAI provides the coaching insights to take your surfing to the next level. SUBSCRIPTIONS: KAI is free to download and includes a free trial analysis. To keep improving, choose an auto-renewable monthly subscription: - Kai Base: 10 AI analyses per month - Kai Premium: unlimited AI analyses and advanced biometrics Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel them anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://wavewise-production.up.railway.app/privacy

Screenshots

Tennis Setup Tracker4 screens
Kai Surf Coach4 screens

Verdict

The call

The clearest difference is in-app purchases: Kai Surf Coach at none against Tennis Setup Tracker's 2. Kai Surf Coach also leads on iOS requirement (15.1 vs 18.6). Tennis Setup Tracker's advantage is update cadence (every 4 days vs every 3 months). 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. Tennis Setup Tracker sells 2 in-app purchases, starting at $1.99 per month. Kai Surf Coach asks for nothing beyond the download.

UpkeepUpdate frequency

Tennis Setup Tracker ships an update every 4 days, Kai Surf Coach every 3 months. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 6 level
Tennis Setup Tracker versus Kai Surf Coach: the parameters behind the verdict, then further details
ParameterTennis Setup TrackerKai Surf Coach
PriceFreeFree
Rating1.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 4 days — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.615.1 — better
Further details — not scored
Size24 MB45 MB
Age rating4+4+
DeveloperAndrea CampodonicoGianmarco Cimini

In-app purchases

2 purchases

Tennis Setup Tracker

Subscriptions2
  • Premium mensile$1.991 Month
  • premium$9.991 Year
None

Kai Surf Coach

No in-app purchases

Questions

Is Tennis Setup Tracker free?
Tennis Setup Tracker is free to download, with in-app purchases available.
Is Kai Surf Coach free?
Kai Surf Coach is free to download, with no in-app purchases.
Do Tennis Setup Tracker or Kai Surf Coach have ads?
Neither Tennis Setup Tracker nor Kai Surf Coach shows ads.
Which is updated more often, Tennis Setup Tracker or Kai Surf Coach?
Tennis Setup Tracker ships an update every 4 days, and Kai Surf Coach every 3 months. Most recently, Tennis Setup Tracker was updated on October 25, 2026 and Kai Surf Coach on October 17, 2026.

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