# RacquetTune - String Tension — user reviews

> 172 indexed App Store user reviews of RacquetTune by Sten Kaiser, rated 4.60/5 from 474 ratings.

- Source: https://appshunter.io/ios/app/racquettune-string-tension/id365729342/reviews
- App overview in markdown: https://appshunter.io/ios/app/racquettune-string-tension/id365729342.md
- Rating breakdown: 5★ 381 · 4★ 55 · 3★ 9 · 2★ 11 · 1★ 18

## What do users think of RacquetTune?

Overall sentiment: neutral

**Pros**

- 🔒 Consistent and precise measurements
- 📊 Useful for tracking tension loss over time
- 🔧 Helpful for customizing rackets
- 📋 Good for logging string usage and tension
- 🔍 Accurate enough for most stringing needs

**Cons**

- 🐛 Inconsistent or inaccurate readings
- 🔍 Not precise enough for some users
- 🤔 Complicated setup/calibration process
- 🔇 Requires a quiet environment to work properly
- 🔌 Stops working after some time

**Commonly reported bugs**

- App crashes when trying to delete rackets
- String factor database not working properly
- Inconsistent readings on the same racket
- Struggles with rackets with built-in dampers

**Most requested features**

- Add more strings to the database
- Allow logging of playing hours
- Improve history/graphing features
- Support for hybrid string setups
- Add racket database for easier setup

## Newest reviews (10 of 172)

### 3/5 — Ok

*2025-04-15*

Egal, mit welcher Härte der Schläger bespannt wird, das Ergebnis ist immer das selbe und variiert nur im minimalen Kommabereich. Die App ist eine nette Spielerei, aber eigentlich ohne nutzen.

### 4/5 — The phone stopped measuring tension. No Support option to ask questions.

*2025-04-13*

The phone stopped measuring tension. No Support option to ask questions.
There is discrepancy to the stringer and other stringing testing apps. Tends to measure below actual by 1-2 kg.

### 2/5 — Clunky, no longer works

*2025-01-23*

I used to love this app.  The UX isn't intuitive but that was ok.  But I can no longer get the tension analyzer to work, making this app useless for me

### 1/5 — Worked ONE TIME (maybe?)

*2022-11-30, version 7.6*

Gave me a number like 27lbs in a racquet that had been strung at 58lbs and played about 50 hours. Then never again another reading using the exact same thing to tap with. Do not get ripped off! Save your $4 and buy a coffee instead.

### 1/5 — Not accurate

*2022-03-08*

Don’t waste your money

### 2/5 — Pretty inconsistent

*2021-06-25*

I place the phone on a table, lay the racquet about an inch above it and use a wooden spatula to hit the strings. It has a delta of +/- 4-5 lbs and is hard for me to trust.

### 1/5 — Geldverschwendung

*2020-09-29*

Mein Wilson Schläger mit 28/27 kg bespannt, testet die App mit 15,8kg. 
Sehr schade um die 3,50€. 
Wie bekomme ich mein Geld zurück?

### 5/5 — Erstaunlich gut

*2020-09-20*

Ich hätte nicht gedacht, dass eine handy app auch nur annähernd korrekte Werte anhand des Tons errechnen kann aber nach 4 besaiteten Schlägern auf einer elektronischen Maschine, die auf 200g genau zieht, und 3 Tagen Test an jedem Schläger muss ich erstaunt und freudvoll schreiben: Die app funktioniert ziemlich genau und die Werte sind absolut verwertbar! 

Der Kauf hat sich gelohnt. Klasse app!

### 1/5 — Not reliable

*2020-08-31*

It doesn’t give you consistent tension. It gives me different tension every time. Total garbage.

### 2/5 — Not consistent or accurate

*2020-08-23*

90% of the time I could no get the app to pick up a tension despite following the guides

Racket strung at 47lbs confirmed on ERT tension tester machine. When I got racket tunes to pick up, it showed 58lbs. Used the correct string set up.

At best this app might be able to tell you which of your rackets is strung a bit tighter. But that’s all. Just a gimmick. 

Wouldn’t waste your money

## Most critical reviews (10 lowest-rated)

### 1/5 — No reading

*2026-06-06, version 7.7*

I’ve followed the instructions in their YouTube video and can never get a reading for tension. Wasted money!

### 1/5 — Stopped working

*2026-03-29*

Seems to have stopped working (does not detect sounds even though microphones access granted) on my iPhone 17 with iOS 26.4.  Please update !

### 1/5 — Stopped picking sound after iOS 26.4 update

*2026-03-28*

Hey Sten, would you please update the app? The app was still picking up my tapping before the 26.4 update. It's completely dead now.

### 1/5 — Komplett unbrauchbar

*2026-02-01*

Nicht kaufen! Ich hatte gedacht aufgrund vieler guten Bewertungen, dass die Personen, die eine schlechte Bewertung abgegeben haben die Einstellungen für das eigene Racket nicht genau eingegeben haben. Ich hab die Schlägerkopfgröße, Besaitungsmuster, die Saiten selber angegeben, und den Dämpfer entfernt. Habe heute einen Schläger mit 22kg bespannt und das Gerät zeigt 13,8kg an. Spart euch die 3€!

### 1/5 — 4lbs off

*2025-08-02, version 7.6*

Never accurate

### 1/5 — Until now a deception

*2025-02-26, version 7.6*

The first time it worked. After that it always came back with the same question: You must first pick a racquet and string … which I did. Strange but for the time now just a deception. Sorry.

### 1/5 — Doesn’t work

*2025-02-13*

Tried it on the same racket 3 times within 10 mins and got 3 different results from 30 lbs up to 60 lbs

### 1/5 — Keep getting the error messages

*2024-11-07*

I recently purchased Racquettune after reading positive reviews, but unfortunately, I haven’t been able to use it yet. I keep getting an error message saying, ‘You must pick a racquet and a string,’ without further guidance on how to resolve it.

### 1/5 — Super schlecht

*2024-02-15*

Ich möchte mein Geld zurück…. Die Guten Bewertungen müssen Fake sein!!!

### 1/5 — Not accurate at all

*2023-12-15, version 7.6*

Waste of money, newly strung racquet at 53lb, app only give 40lb, tested a few more, none of them even close. Don’t buy!

## Most praised reviews (10 highest-rated)

### 5/5 — great tool

*2026-06-09*

been using it for years. great that it has note functions. I can know: when tension drops, How well I strung the racket and I can rate the setup for the future. Especially good for a nerd like me that tries a lot of different setups

### 5/5 — Works well

*2026-04-05, version 7.7*

Good for tracking tension drop

### 5/5 — 使えるようになった。

*2026-04-03*

アップデートありがとう。

### 5/5 — お手軽に測定できる

*2025-07-12*

テンションの落ち具合を手軽に測定でき便利です。が、アップデートのせいなのか過去のデータが全て消えてしまいました。。。元に戻してください。

### 5/5 — Great to understand tension

*2025-05-28*

Great to understand how tension declines, not accurate but precise!.
Keep notes on how it played and use the tension reported by the app as a reference. 
I use RPM Blast 17, pre-stretched 15 sec, strung at 55:53 and app reports 45.4, still very useful since these measurements are very consistent. I use this app now to keep a log of my string usage and tension. I recommend it!

### 5/5 — It works for me

*2024-07-15*

To get it right, get a new string on your racquet and play with the value of the string factor until match the value tension of you new strings.. it works for me 👍

### 5/5 — I must be doing it wrong

*2022-04-21*

I restrung my racquet at 55#. This app said the tension was 40.2# right after I finished. I checked the string factor and ensured that I’d entered the correct values all the parameters (e.g. string pattern, racquet face size). I followed the measurement procedure to the letter. 
I could believe a couple lb. change but 15? Nyet. The racquet plays like 50-55. 
A Gamma String Tension Tester said the two center main strings were at 55# and the two center cross strings were at 39 and 40#. 
Why are other users getting numbers close to the tension at which they strung?
Not even close for this app. Sorry

### 5/5 — Amazingly Accurate

*2021-10-11*

It’s almost too good to be true. I get readings and I think, no, it must be wrong. It can’t be a mistake a made. Sure enough, I did something wrong. 

When I string exactly the same, I get the exact same output. This is an amazing app. 

It has helped me string better and learn more about how my string tension changes over time. 

Well done!!

### 5/5 — Better than I expected

*2021-05-12*

I have had this App for a week now and the results have been much better than expected! I use it to find out how much tension drops after each playing session.

### 5/5 — String factor accuracy is crucial

*2020-12-22*

Fantastic app. Incredibly useful to graph how the racket loses tension over time. Readings are very accurate. (note, if I’m stringing a poly, I can sometimes lose up to 10% by the time it’s off the stringer, then maybe another 10% over the next 48 hours) String factor accuracy is crucial, and the online database can be hit or miss, you’ll see lots of variation in there. You should measure this yourself to make sure it’s accurate, because it will greatly affect the reading. I use the weight method, and that’s worked out well for me so far.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*