---
title: "RacquetTune - ストリング テンション - Reviews, Revenue and Downloads in Japan | Apple App Store"
description: "Listen to your racquet and perfect your game!   RacquetTune ensures that your racquet is ideally suited to your style of play. Simple and straightforward to use, the app uses the sound generated by ta"
---

# RacquetTune - ストリング テンション — Japan

![RacquetTune App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/2e/c3/94/2ec394b0-2182-313b-93ab-61c6e02184fd/AppIcon-0-0-1x_U007emarketing-0-7-0-0-85-220.png/434x0w.png)

**Developer:** [Sten Kaiser](https://apptail.io/developer/sten-kaiser-lPW)
**Category:** Sports
**Rating:** 4.5/5 (254 ratings)
**Price:** Free
**Bundle ID:** racquetTune
**Store:** Apple App Store
**Country:** Japan
**Version:** 7.7 (released 2026-04-02)
**Original Release:** 2010-04-07
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/jp/app/app/id365729342)
**AppTail Page:** [https://apptail.io/app/racquettune-string-tension-CTHb/japan](https://apptail.io/app/racquettune-string-tension-CTHb/japan)

## RacquetTune Description
Listen to your racquet and perfect your game! 

RacquetTune ensures that your racquet is ideally suited to your style of play. Simple and straightforward to use, the app uses the sound generated by tapping the strings to calculate the tension with high accuracy. In addition, the interactive swingweight calculator aids in customizing your racquet to fit your own stroke pattern, while the stiffness calculator allows you to simulate different racquet configurations. 

RacquetTune not only makes it easier to decide when it is time to restring, it is also an invaluable tool when testing different racquets and strings and in identifying which of your racquets is best suited for different types of games. RacquetTune also allows you to check whether your stringer is consistent in his work. 
RacquetTune includes the following user-friendly tools: 

Tension measurement 
- Quickly determines the tension and stringbed stiffness. 
- Able to detect changes in tension as small as 0.1 kg/0.2 lb. 
- An accuracy indicator ensures results are consistent. 
- Graphical presentation of sound waves helps you find the ideal way of tapping the strings. 
- Settings can be customized to serve tennis, squash, racquetball and badminton racquets, respectively. 
- View the tension history for each racquet as a list or a graph. 
- Email a spreadsheet with test data. 

Swingweight calculator 
- Add as many weights as you wish to the frame. 
- Move and change weights to visualize how swingweight, balance and sweet spot location are affected. 
- Enter target values for the racquet and let RacquetTune distribute the weights automatically. 

Stiffness calculator 
- Simulate various racquet and string configurations 
- Vary tension, string type and racquet head size. 
- Shows load-displacement curves, stiffness and elastic energies 
- Handles the large deformations encountered in actual play 

View a demo video at racquettune.com 

RacquetTune has been featured in tennis magazines in USA, Italy, France, Germany, Sweden and Norway. 

"The app is very, very impressive. I get more tension diagnostic questions than just about anybody in the universe, so this is a very good thing to be able to recommend." 
Jonathan Wolfe 
US Racquet Stringers Association 

Note, that the actual string tension in the racquet and the setting seen on a stringing machine are two different things and therefore incomparable - more information can be found at racquettune.com.

## RacquetTune Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple62/v4/87/50/2a/87502a73-ed5a-e83d-fd1d-f316987d9b20/mzl.sleucpdy.jpg/640x920.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple62/v4/e7/b7/97/e7b79705-4d6a-0ad7-7c23-3af80ef62799/mzl.efymddzm.jpg/640x920.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple71/v4/8a/3f/f9/8a3ff9d4-8533-bb9d-0165-cabc1f681bd3/mzl.uonrgfgv.jpg/640x920.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple71/v4/51/e1/3b/51e13be0-d692-f69d-42ab-67d612a4fadf/mzl.fkjveqel.jpg/640x920.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple71/v4/60/1c/35/601c3572-43cc-6f39-363b-de9ff186f8e8/mzl.vzfzkdsl.jpg/640x920.png)

## RacquetTune Rating Breakdown in Japan
- 5 stars: 172 (68%)
- 4 stars: 57 (22%)
- 3 stars: 17 (7%)
- 2 stars: 2 (1%)
- 1 stars: 6 (2%)

## RacquetTune Reviews in Japan

### ****- "7.0よりは良くなったが・・・"
折れ線グラフの復活は非常に嬉しい。ただ以前のはテンションを測るラケットが複数あって、それぞれのガットが違う場合、最初に登録したらそれぞれのラケットを選んだ時に自動的に最初に登録したガットとの組み合わせになってスムーズに行えたものが、今は測るラケットを変える度にガットも選び直さなくてはならないのでややストレスを感じる。このアプリは非常に良いものであり、私自身が重宝しているが故に、どうしても使いやすかった以前のと比べてしまいます。検討してみてください。
-- hisizo, 2019-01-04

### ***** "テンション経時劣化グラフの復活を！"
バージョン7.0へのアップデートで、横軸 経過日数 vs 縦軸 テンション のグラフ表示が無くなってしまい残念！至急復活させて下さい。

全体としては、すごく良いアプリ！
ストリング張替時と練習後に毎回測定しています。操作も簡単で数値化できるのがGood！
-- Damasaretazo, 2018-12-26

### *---- "アップデートで不具合です"
ポンドが計測してもヒストリーでkg表示に代っています。過去の計測値もkgで表示されます。
急いで改善して下さい。
-- ﾄｸﾒｲｷﾎﾞｳ@, 2018-12-22

### *---- "データ消えた"
非常に便利に快適に使わせて頂いていましたが
アップデートで保存していたデータの一部が消えてしまい、
また折れ線グラフの表示機能も無くなってしまいました。
改悪だと思います。
ファンだっただけに残念です。
-- のののあああ, 2018-12-19

### ****- "わかりやすくが"
日本語でもあったらいいと思います。
-- たちぼー, 2018-09-23

### ****- "意外と使いやすい"
どうせ設定とか面倒なんだろうとダメもとで使い始めましたが、意外と、直感操作でサクサク使えます。
欲を言えば、老眼なりかけにとっては字が小さすぎてつらいのと、ストリング設定のリストにベッドのソニックプロエッジも追加して欲しいということくらいでしょうか。
-- てにばば, 2018-08-09

### ***** "コスパ最高"
精度も完璧だね〜
-- wakaccha, 2018-04-13

### *---- "なんなん"
設定が全くわからん。日本語あるけどわけわからん全部日本語対応してほしい。消したわ
-- きししん, 2015-12-06

### ***** "素晴らしいexcellent"
ホームストリンガーにとって必須アプリです。是非日本語対応を！
please support japanese!
-- とるみは, 2015-02-14

### ***** "文字化け"
テンション内のラケットデータが文字化けして見れなくなった。
新規入力してもしばらくするとまた文字化けする。
バージョンが新しくなってから突然の症状です。
誰か助けてください。
-- 16622reo, 2014-05-12

### ***** "信頼できる"
数値が安定して出る。
感触通りの結果が出るので、張替えのテンションの指示が的確に出来る
-- リョーマちゃん, 2014-05-06

### ***** "治りました。"
初代iPadで5.2にUpしたところ起動できなくなりましたが、5.2.1で修正されたようです。アップルってこんな大事なところを審査しないんですね。
いつの間にか￥300に値上がりしてますね。

ストリンガーでない一般の選手もテンション降下を認識する上で是非お勧めしたいアプリです。
張りたてに近いほど一気にテンションが降下し、3ヶ月もするとほとんど変化しないことが理解できるようになります。
「ほとんど変化しない」=「死んだガット」なのです。
非常に良くできたアプリですが、問題があるのはハイブリッドです。一応設定はできますが、これは2種類のガットを同じ長さで張った想定になってしまっています。
普通のラケットは縦の方が長くできていますので、誤差が出てしまうことでしょう。
どうしても気になる場合は、長さの比を換算してString Factor係数を手動で設定する必要がありそうです。
Ball Contact Timeが測定できれば嬉しいです。
-- Edberg888, 2014-05-05

### ****- "テンションロスが可視化できる"
初めの1〜2週間の変化が非常に大きいことが確認できた。
-- 猿が島, 2013-12-04

### **--- "やり方がわからないT^T"
誰かやり方教えて〜
-- ひかるんるん(´･Д･), 2013-08-24

### ***** "これは良い♫"
実際に張るときに言ってる数値はマシーンで掛けてる張力で、張り上がりの数値は５lb程度低いらしい。その後のテンションロスなども勘案するとあながち間違ってはなさそうな数値。
正確な数値はわからずともテンションロスさえ測定できれば張り替えの時期はわかるので十分使えるアプリだと思います(^^)
-- ツォンガくん, 2013-07-03

### ***** "かなりの感動もの🎵"
自分で計測したストリングファクターを使える所は特に感動。ホームストリンガーにはマストアイテムだと思います。
-- Mom-stringer, 2013-03-09

### ***** "Good"
Good
-- Smatoto, 2013-03-09

### ***** "便利です"
定量的にガットのコンディションを把握できる、非常に便利なアプリです
-- ttr134, 2012-09-08

### ***** "ばぼらー"
テニスラケットに関するアプリは少ないですが、唯一の真面目かつマトモに動くアプリです。
バク解消や機能追加のアップデートも適時行われてますね。
-- nobukichi.jp, 2012-06-06

### ***** "助かる"
非常に助かるアプリです。
毎回計測してストリングのゆるみを把握してます。自分にとっては値段以上の働きをみせる納得の出来です。
-- iKHiro, 2012-06-02

[View all RacquetTune reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews)


## RacquetTune Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | Denmark | Sports | #2 |
| Top Paid | United Arab Emirates | Sports | #2 |
| Top Paid | Argentina | Sports | #3 |
| Top Paid | Italy | Sports | #4 |
| Top Paid | Brazil | Sports | #4 |
| Top Paid | Russia | Sports | #5 |
| Top Paid | Taiwan | Sports | #5 |
| Top Paid | Czechia | Sports | #5 |
| Top Paid | Japan | Sports | #5 |
| Top Paid | Singapore | Sports | #6 |
| Top Paid | Sweden | Sports | #6 |
| Top Paid | Greece | Sports | #7 |
| Top Paid | Romania | Sports | #7 |
| Top Paid | Poland | Sports | #9 |
| Top Paid | Peru | Sports | #9 |
| Top Paid | Hong Kong SAR China | Sports | #9 |
| Top Paid | Indonesia | Sports | #10 |
| Top Paid | Germany | Sports | #11 |
| Top Paid | Thailand | Sports | #12 |
| Top Paid | South Korea | Sports | #12 |
| Top Paid | Vietnam | Sports | #13 |
| Top Paid | India | Sports | #13 |
| Top Paid | Ecuador | Sports | #14 |
| Top Paid | Portugal | Sports | #15 |
| Top Paid | Nigeria | Sports | #15 |
| Top Paid | Chile | Sports | #16 |
| Top Paid | Pakistan | Sports | #17 |
| Top Paid | Finland | Sports | #17 |
| Top Paid | Türkiye | Sports | #17 |
| Top Paid | Malaysia | Sports | #18 |
| Top Paid | Colombia | Sports | #19 |
| Top Paid | Philippines | Sports | #19 |
| Top Paid | Egypt | Sports | #21 |
| Top Paid | Israel | Sports | #22 |
| Top Paid | United States | Sports | #24 |
| Top Paid | Ukraine | Sports | #27 |
| Top Paid | Dominican Republic | Sports | #28 |
| Top Paid | Austria | Sports | #28 |
| Top Paid | France | Sports | #28 |
| Top Paid | Spain | Sports | #31 |
| Top Grossing | Russia | Sports | #32 |
| Top Paid | China | Sports | #38 |
| Top Paid | Lebanon | Sports | #39 |
| Top Paid | Mexico | Sports | #40 |
| Top Paid | Hungary | Sports | #40 |
| Top Paid | Kazakhstan | Sports | #41 |
| Top Paid | Netherlands | Sports | #41 |
| Top Paid | Belgium | Sports | #43 |
| Top Paid | Argentina | Overall | #44 |
| Top Paid | Ireland | Sports | #45 |
| Top Paid | Switzerland | Sports | #45 |
| Top Paid | Canada | Sports | #48 |
| Top Paid | Belarus | Sports | #53 |
| Top Paid | South Africa | Sports | #55 |
| Top Paid | New Zealand | Sports | #61 |
| Top Paid | Saudi Arabia | Sports | #62 |
| Top Paid | Norway | Sports | #62 |
| Top Grossing | Argentina | Sports | #69 |
| Top Paid | Australia | Sports | #77 |
| Top Paid | Czechia | Overall | #84 |
| Top Paid | Azerbaijan | Sports | #88 |
| Top Paid | Denmark | Overall | #90 |
| Top Paid | United Kingdom | Sports | #111 |
| Top Paid | Sweden | Overall | #118 |
| Top Paid | Brazil | Overall | #119 |
| Top Paid | Italy | Overall | #120 |
| Top Paid | United Arab Emirates | Overall | #127 |
| Top Paid | Kuwait | Sports | #155 |
| Top Paid | Japan | Overall | #173 |
| Top Paid | Poland | Overall | #186 |
| Top Paid | Russia | Overall | #231 |
| Top Paid | Germany | Overall | #261 |
| Top Paid | Taiwan | Overall | #395 |
| Top Paid | Spain | Overall | #480 |

## RacquetTune Discovered Keywords
- tensio

## Apps Similar to RacquetTune
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## RacquetTune Available In
- [United States](https://apptail.io/app/racquettune-string-tension-CTHb/united-states)
- [Japan](https://apptail.io/app/racquettune-string-tension-CTHb/japan)
- [Germany](https://apptail.io/app/racquettune-string-tension-CTHb/germany)
- [Italy](https://apptail.io/app/racquettune-string-tension-CTHb/italy)
- [Canada](https://apptail.io/app/racquettune-string-tension-CTHb/canada)
- [Australia](https://apptail.io/app/racquettune-string-tension-CTHb/australia)
- [United Kingdom](https://apptail.io/app/racquettune-string-tension-CTHb/united-kingdom)
- [Brazil](https://apptail.io/app/racquettune-string-tension-CTHb/brazil)
- [South Korea](https://apptail.io/app/racquettune-string-tension-CTHb/south-korea)
- [Austria](https://apptail.io/app/racquettune-string-tension-CTHb/austria)
- [Switzerland](https://apptail.io/app/racquettune-string-tension-CTHb/switzerland)
- [Netherlands](https://apptail.io/app/racquettune-string-tension-CTHb/netherlands)
- [France](https://apptail.io/app/racquettune-string-tension-CTHb/france)
- [China](https://apptail.io/app/racquettune-string-tension-CTHb/china)
- [Sweden](https://apptail.io/app/racquettune-string-tension-CTHb/sweden)
- [Hong Kong SAR China](https://apptail.io/app/racquettune-string-tension-CTHb/hong-kong)
- [Romania](https://apptail.io/app/racquettune-string-tension-CTHb/romania)
- [Belgium](https://apptail.io/app/racquettune-string-tension-CTHb/belgium)
- [Poland](https://apptail.io/app/racquettune-string-tension-CTHb/poland)
- [Spain](https://apptail.io/app/racquettune-string-tension-CTHb/spain)
- [Finland](https://apptail.io/app/racquettune-string-tension-CTHb/finland)
- [Türkiye](https://apptail.io/app/racquettune-string-tension-CTHb/turkey)
- [Czechia](https://apptail.io/app/racquettune-string-tension-CTHb/czechia)
- [Slovakia](https://apptail.io/app/racquettune-string-tension-CTHb/slovakia)
- [Portugal](https://apptail.io/app/racquettune-string-tension-CTHb/portugal)
- [Russia](https://apptail.io/app/racquettune-string-tension-CTHb/russia)
- [Taiwan](https://apptail.io/app/racquettune-string-tension-CTHb/taiwan)
- [New Zealand](https://apptail.io/app/racquettune-string-tension-CTHb/new-zealand)
- [Denmark](https://apptail.io/app/racquettune-string-tension-CTHb/denmark)
- [Singapore](https://apptail.io/app/racquettune-string-tension-CTHb/singapore)
- [Lithuania](https://apptail.io/app/racquettune-string-tension-CTHb/lithuania)
- [Thailand](https://apptail.io/app/racquettune-string-tension-CTHb/thailand)
- [Argentina](https://apptail.io/app/racquettune-string-tension-CTHb/argentina)
- [Croatia](https://apptail.io/app/racquettune-string-tension-CTHb/croatia)
- [Hungary](https://apptail.io/app/racquettune-string-tension-CTHb/hungary)
- [Indonesia](https://apptail.io/app/racquettune-string-tension-CTHb/indonesia)
- [Greece](https://apptail.io/app/racquettune-string-tension-CTHb/greece)
- [Chile](https://apptail.io/app/racquettune-string-tension-CTHb/chile)
- [Norway](https://apptail.io/app/racquettune-string-tension-CTHb/norway)
- [South Africa](https://apptail.io/app/racquettune-string-tension-CTHb/south-africa)
- [India](https://apptail.io/app/racquettune-string-tension-CTHb/india)
- [Mexico](https://apptail.io/app/racquettune-string-tension-CTHb/mexico)
- [Bulgaria](https://apptail.io/app/racquettune-string-tension-CTHb/bulgaria)
- [Slovenia](https://apptail.io/app/racquettune-string-tension-CTHb/slovenia)
- [Ireland](https://apptail.io/app/racquettune-string-tension-CTHb/ireland)
- [United Arab Emirates](https://apptail.io/app/racquettune-string-tension-CTHb/united-arab-emirates)
- [Latvia](https://apptail.io/app/racquettune-string-tension-CTHb/latvia)
- [Israel](https://apptail.io/app/racquettune-string-tension-CTHb/israel)
- [Malaysia](https://apptail.io/app/racquettune-string-tension-CTHb/malaysia)
- [Dominican Republic](https://apptail.io/app/racquettune-string-tension-CTHb/dominican-republic)
- [North Macedonia](https://apptail.io/app/racquettune-string-tension-CTHb/north-macedonia)
- [Estonia](https://apptail.io/app/racquettune-string-tension-CTHb/estonia)
- [Armenia](https://apptail.io/app/racquettune-string-tension-CTHb/armenia)
- [Cyprus](https://apptail.io/app/racquettune-string-tension-CTHb/cyprus)
- [Ecuador](https://apptail.io/app/racquettune-string-tension-CTHb/ecuador)
- [Philippines](https://apptail.io/app/racquettune-string-tension-CTHb/philippines)
- [Saudi Arabia](https://apptail.io/app/racquettune-string-tension-CTHb/saudi-arabia)
- [Egypt](https://apptail.io/app/racquettune-string-tension-CTHb/egypt)
- [Algeria](https://apptail.io/app/racquettune-string-tension-CTHb/algeria)
- [Colombia](https://apptail.io/app/racquettune-string-tension-CTHb/colombia)
- [Ukraine](https://apptail.io/app/racquettune-string-tension-CTHb/ukraine)
- [Uzbekistan](https://apptail.io/app/racquettune-string-tension-CTHb/uzbekistan)
- [Vietnam](https://apptail.io/app/racquettune-string-tension-CTHb/vietnam)
- [Kazakhstan](https://apptail.io/app/racquettune-string-tension-CTHb/kazakhstan)
- [Kuwait](https://apptail.io/app/racquettune-string-tension-CTHb/kuwait)
- [Lebanon](https://apptail.io/app/racquettune-string-tension-CTHb/lebanon)
- [Sri Lanka](https://apptail.io/app/racquettune-string-tension-CTHb/sri-lanka)
- [Madagascar](https://apptail.io/app/racquettune-string-tension-CTHb/madagascar)
- [Macao SAR China](https://apptail.io/app/racquettune-string-tension-CTHb/macau)
- [Malta](https://apptail.io/app/racquettune-string-tension-CTHb/malta)
- [Nigeria](https://apptail.io/app/racquettune-string-tension-CTHb/nigeria)
- [Azerbaijan](https://apptail.io/app/racquettune-string-tension-CTHb/azerbaijan)
- [Bahrain](https://apptail.io/app/racquettune-string-tension-CTHb/bahrain)
- [Iceland](https://apptail.io/app/racquettune-string-tension-CTHb/iceland)
- [Peru](https://apptail.io/app/racquettune-string-tension-CTHb/peru)
- [Pakistan](https://apptail.io/app/racquettune-string-tension-CTHb/pakistan)
- [Paraguay](https://apptail.io/app/racquettune-string-tension-CTHb/paraguay)
- [Belarus](https://apptail.io/app/racquettune-string-tension-CTHb/belarus)

---

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