Comparison

Tennis Scorekeeper vs Stringer Log

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

Head to head
About

Tennis Scorekeeper

Effortlessly record tennis and soft tennis scores and track key match statistics like serve percentage, aces, and winners. Visualize your performance with clear charts and heart rate data from your Apple Watch. Supports singles and doubles, with advanced individual stats for all four players in doubles available with premium.

Highlights
  • One-tap scoring
  • Match statistics tracking
  • Apple Watch heart rate monitoring
  • Point history view
  • Doubles support
  • Cloud backup
  • Score sheet export
Features
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See every match through data — and discover how to improve. DataTennis is a tennis scorekeeper and match analysis app for singles and doubles. Record every point quickly on your iPhone, iPad, or Apple Watch. Review detailed tennis statistics, analyze rally length, track heart rate, and discover patterns in your matches. Perfect for players, coaches, parents, and tennis fans. ◆ Quick & Easy Scorekeeping Choose the recording style that fits you: • Simple Mode — tap the point winner for fast scorekeeping • Detailed Modes — record winners, errors, shot types, forehand/backhand, and more • Undo — correct input mistakes instantly Games, sets, tiebreaks, and serving order are managed automatically. ◆ Detailed Match Statistics Turn every recorded match into useful stats: • Serve and return performance • Points won and lost • Aces, winners, and errors • Forehand and backhand analysis • Forced and unforced errors • Set-by-set statistics • Point-by-point history • Match flow graphs See not only who won, but how each point was won or lost. ◆ Rally Count & Analysis Record the number of shots in each point and analyze rally length. • Average rally length • Longest rally • Points won and lost by rally length • Rally statistics by game Discover whether you perform better in short or long rallies and identify areas to improve. ◆ Singles & Doubles DataTennis supports both singles and doubles. In doubles, you can record all four players individually and analyze winners and errors for each player. ◆ Share Matches on the Web Share match scores and statistics with a simple web link. The person you share with does not need to install DataTennis. They can open the link in any web browser and review the match directly. Share matches with coaches, parents, family, teammates, practice partners, or other players. ◆ Apple Watch Support Record matches directly from your Apple Watch without taking your iPhone onto the court. • Enter scores from your wrist • Record detailed point results • Track heart rate during matches • Review heart rate point by point • View match history on Apple Watch • Send recorded matches to your iPhone Combine match data with heart rate to better understand match intensity. ◆ Flexible Match Formats Supports a wide range of tennis formats: • Best of 1, 3, or 5 sets • First to 3, 4, 6, or 8 games • 8-game pro sets • 7-point and 10-point tiebreaks • 10-point super tiebreaks • Deuce, No-Ad, and Semi-Advantage ◆ Score Sheets & Match Data • View score sheets • Review point-by-point history • Share match results • Export match data as CSV with Premium • Save and share score sheets ◆ Premium Plan Upgrade to Premium for more powerful recording and analysis features. Premium includes: • Unlimited match recording • CSV export for advanced analysis • Individual tracking for all four players in doubles • Individual winner and error analysis in doubles • Watermark-free score sheet export • Heart rate tracking during matches • Point-by-point heart rate data • Extended match history on Apple Watch • Additional advanced recording features ◆ Recommended For • Tennis players who want to improve through match data • Coaches analyzing player performance • Parents recording and reviewing their children's matches • Teams, clubs, and tennis schools • Tennis fans analyzing matches point by point Don't just record the score. Turn every match into data you can learn from. Support & Contact For feedback, suggestions, or issues: datatennisnet@gmail.com Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://datatennis.net/privacypolicy-en.html

About

Stringer Log

Features
Read full description

『Stringer Log』は、Appleのヘルスケア(HealthKit)データと連動し、ガットのテンション低下を「客観的かつ科学的」にシミュレーションする新世代のテニスストリング管理アプリです。 ただ張り替えた日付とポンド数をメモするだけの時代は終わりました。 ガットの寿命は「バッグの中で過ぎていく時間」と「実際にコートでボールを打った時間と激しさ」の両方によって決まります。本アプリは、この2つの要素を分離して計算する『ハイブリッド減衰エンジン』を搭載。プロのストリンガーの感覚に極限まで近づけたリアルなテンション予測を提供します。 【主な機能と特徴】 ・ ヘルスケア(HealthKit)連携による動的劣化シミュレーション Apple Watch等で記録されたテニスのワークアウトデータを自動で読み込みます。「プレイ時間」「平均心拍数(運動強度)」「歩数」「プレイ時の気温」から、ガットが受けた物理的ダメージを精密に算出し、テンション低下グラフにダイレクトに反映させます。 ・ 素材と太さ(ゲージ)に基づくハイブリッド減衰エンジン ポリエステル特有の「初期落ち後の急激なスナップバック喪失(Dead状態)」や、ナチュラルガットの「最後まで粘り強くテンションを維持する特性」など、素材(ポリ / ナイロン・モノ / ナイロン・マルチ / ナチュラル)ごとの物理的な限界値と減衰カーブを完全再現。1.25mmを基準としたゲージ(太さ)の違いや、夏場・冬場の季節要因まで計算に組み込みます。 ・ ラケットの「スペア(未使用)」運用に完全対応 2本以上のラケットを運用する競技プレイヤーのために「利用中フラグ」を搭載。「張り替えたけれど、相方のガットが切れるまではサブバッグで寝かせている」という期間は、打撃ダメージを含まない「静的劣化のみ(0.2倍速)」としてシミュレーションを保留します。「使用開始日」を記録した瞬間から動的劣化の計算がスタートする、超実践的な仕様です。 ・ 縦横ハイブリッド対応の詳細なストリングログ メイン(縦)とクロス(横)のガット種類、太さ、テンションを別々に記録可能。ノッチ(交差点の溝)の深さの変化を写真で残せるタイムライン機能や、自分だけの「感触・スピン」の5段階評価など、テニスギアの探求に必要な情報を美しく管理できます。 ・ 週末プレイヤー向けの手動頻度入力 スマートウォッチをお持ちでない場合でもご安心ください。「月1回」「週1〜2回」「ほぼ毎日」といったプレイ頻度をリストから選択するだけで、週末プレイヤーの感覚に寄り添ったマイルドで現実的なテンション低下シミュレーションが機能します。 ・CSVエクスポート&インポート 大切なストリングの記録はCSVファイルとして書き出し、表計算ソフトで自由に分析可能。機種変更時や一括登録時にも便利なインポート機能も備えています。 【こんなプレイヤーにおすすめ】 ガットの張り替えタイミング(賞味期限)をいつも迷ってしまう方 テンションロスによる手首やテニス肘への負担を防ぎたい方 メインとクロスで異なるガットを張る(ハイブリッド)など、セッティングにこだわりのある方 複数本のラケットをローテーションで回している競技者 自身のテニスの運動量とギアの消耗をリンクさせてデータ化したい方 『Stringer Log』は、あなたのテニスライフに寄り添い、常に最高のパフォーマンスを発揮できる「ベストな打感」を逃さないための専属ストリンガーとして機能します。

Screenshots

Tennis Scorekeeper4 screens
Stringer Log1 screens

Verdict

The call

The clearest difference is in-app purchases: Stringer Log at none against Tennis Scorekeeper's 1. Tennis Scorekeeper's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.6). On price, update cadence and ads 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 Scorekeeper sells 1 in-app purchase, starting at $3.99 per month. Stringer Log asks for nothing beyond the download.

UpkeepUpdate frequency

Tennis Scorekeeper ships an update every 5 days, Stringer Log every 8 days. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

Scorecard3 real differences · 7 level
Tennis Scorekeeper versus Stringer Log: the parameters behind the verdict, then further details
ParameterTennis ScorekeeperStringer Log
PriceFreeFree
Rating4.0 (4 ratings) — better—
Positive reviews80.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 5 days — betterEvery 8 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size92 MB8 MB
Age rating4+4+
DeveloperMakutaDataBUNTA OKAMOTO

In-app purchases

1 purchases

Tennis Scorekeeper

Subscriptions1
  • Premium Plan$3.991 Month
None

Stringer Log

No in-app purchases

Questions

Is Tennis Scorekeeper free?
Tennis Scorekeeper is free to download, with in-app purchases available.
Is Stringer Log free?
Stringer Log is free to download, with no in-app purchases.
Do Tennis Scorekeeper or Stringer Log have ads?
Neither Tennis Scorekeeper nor Stringer Log shows ads.
Which is updated more often, Tennis Scorekeeper or Stringer Log?
Tennis Scorekeeper ships an update every 5 days, and Stringer Log every 8 days. Most recently, Tennis Scorekeeper was updated on October 3, 2026 and Stringer Log on October 19, 2026.

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