Tension Lab vs StringPing
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tension Lab
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Your strings change every time you play. Tennis Tension Lab helps you see that change before it surprises you on court. Place your phone beside the racquet and tap the center of the string bed three to five times. The app analyzes the sound on your device and gives you a repeatable tension estimate in seconds. KEEP YOUR SETUP CLEAR • Check current string tension • Compare each reading with the baseline from a fresh string job • Follow tension loss on a simple timeline • See when it may be time to restring • Keep every racquet, string job, hybrid setup and note together • Find models quickly in a catalog of 1,347 racquets and 216 strings • Compare string characteristics before choosing your next setup MADE FOR THE COURT No account is required to start. Tap audio is analyzed in memory and discarded; only measurement results are saved. Choose lb or kg and keep your history organized by racquet. For the most consistent results, measure the same racquet in a quiet place with the same tapping method. Readings are estimates based on sound and equipment information, not certified measurements from a stringing machine.
StringPing
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StringPing turns the sound of your strings into a tension reading. Tap the center of your string bed with the heel of your palm and StringPing listens to the "ping," measures its pitch, and estimates your string tension in seconds — no gauge, no trip to the stringer. Strings lose tension the moment they're installed and keep dropping with every hit. StringPing helps you feel it before your game tells you: track each racquet over time and watch the tension-loss curve so you know exactly when it's time to restring. HOW IT WORKS • Pick your racquet, string, and pattern (or scan with sensible defaults) • Tap the string bed a few times • StringPing captures each tap, filters out noise and outliers, and averages the readings for a confident result • Save it to build a history for that racquet TRACK EVERY RACQUET Keep a library of your frames with their string setup and last-measured date • See a tension-over-time chart for each racquet • Review a full scan log with the drop between each reading • Know how many weeks a string bed has been in play BUILT FOR THE COURT Fast, on-device analysis — your audio never leaves your phone • Works across common racquet head sizes and string patterns • Clear confidence indicator so you know when a reading is solid • Pounds or kilograms A NOTE ON ACCURACY StringPing is an acoustic estimate, not a stringing machine. It shines at tracking relative change over time on the same racquet and string — the best way to catch a string bed going dead.
Screenshots
Verdict
The clearest difference is in-app purchases: Tension Lab at none against StringPing's 4. Tension Lab also leads on iOS requirement (15.1 vs 26.5). StringPing's advantage is update cadence (daily vs every 5 days). 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
Both are free to download. StringPing sells 4 one-off in-app purchases. Tension Lab asks for nothing beyond the download.
Tension Lab ships an update every 5 days, StringPing daily. The most recent releases landed on November 8, 2026 and November 6, 2026 respectively.
| Parameter | Tension Lab | StringPing |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | Daily — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 26.5 |
| Further details — not scored | ||
| Size | 104 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | SEOKWON KONG | Korhan Pekun |
In-app purchases
Tension Lab
No in-app purchases
StringPing
- Overgrip$1.99
- Can of Tennis Balls$4.99
- Set of Strings$9.99
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- Reel of String$19.99
Questions
Is Tension Lab free?
Is StringPing free?
Do Tension Lab or StringPing have ads?
Which is updated more often, Tension Lab or StringPing?
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