DsStopWatch vs RaceWatch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DsStopWatch
This utility allows for precise time measurement with multiple stopwatches. It offers real-time recording, saving, and copying of time data in CSV format. Advanced features include button operation customization, lock mode for preventing accidental presses, and the ability to synchronize operations.
- Multiple stopwatches
- Real-time time recording
- Save and copy time records (CSV)
- Customizable button operations
- Lock mode for accidental presses
- Light and dark screen modes
- Operation cancellation and modification
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1. How to operate (1) Button operation Operable buttons are colored. (2) Time record The measured time is recorded on the record screen in real time. To see the new record screen, press the Record> button. To see the old record screen, press the R button. To clear the time record, press the Clear All button twice. To save the time record, press the Save All button twice. Time record saves are overwritten each time. When you press the Copy button, the time record is copied to the clipboard in csv format, so you can paste it to Numbers etc. Selecting a name will display the selected person's time record. By selecting the unit distance for lap timing, the lap time for each unit distance is displayed. (3) Button operation reaction Vibration by button operation, click sound, support voice are possible. Operate with the Vibration button, Click button, and Voice button. (4) Name change You can change the name. Press the Name button or RUN button to enter LOCK mode, select a name to change the name, and press the return key to confirm the name change. Even if you change the name, pressing anything other than the return key cancels the name change. (5) LOCK mode Button operation can be prohibited to prevent erroneous button operation. If you press the Name button or RUN button to enter LOCK mode, button operation is prohibited. To cancel LOCK mode, press the Name button or LOCK button again. (6) Light screen and dark screen You can switch between light screen and dark screen. Please push the Light button or the Dark button. (7) Operation cancellation function The operation cancellation function can cancel the button operation. Only the last button operation can be canceled. Press the Undo button immediately after pressing the button. (8) Operation change function The operation change function can cancel and change the button operation. Only the last button operation can be changed. Immediately after pressing the button, press the Undo button, press the Sync button, and then press the button you want to change. (9) Operation addition function Operation addition function can be added by synchronizing button operation. It can be added in sync with the last button operation. Immediately after pressing the button, press the Sync button, then press the button you want to add. (10) Select mode Select mode allows you to operate multiple buttons at the same time. Press the Sel button to switch to select mode, select multiple buttons you want to operate at the same time, and then press the Sel button at the bottom. (11) Tapping mode The tapping mode allows you to tap first and then assign the tapping operation to any button on the stopwatch. Press the Tap button to switch to tapping mode, press the Tapping button, then press the button you want to assign to the stopwatch. You can also use A, G, 0 on the external keyboard and 0 on the numeric keypad instead of the Tapping button. The Tapping button can be memorized up to 10 times. 2. Operation Lap time and total time are displayed repeatedly in the range from 00:00.0 to 59:99.9. The time record on the record screen is displayed repeatedly in the range from 0:00:00.0 to 9:59:59.9. The Lap button also displays the number of Laps. The Lap button repeats the display in the range from 0 to 9. Lap on the record screen is displayed repeatedly in the range from 0 to 99. The resolution of the time display is 0.1 seconds, but the internal time is measured with a higher resolution. The action of each button starts at the moment the button is pressed and released. (Same as apple genuine app.) Even if you quit the app or turn off the power of the smartphone, it will continue to keep time when you start the app. There is no background processing, so this app will not drain your battery when you close it.
RaceWatch
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RaceWatchは、レースのリアルタイム観戦とレース後の分析に最適な、レースファン・レーサー向けアプリです。 レース中は、リアルタイムの順位表やコース図上のドライバー位置を確認できます。順位やタイムの変化を視覚的に把握できるため、現地観戦やレース中継とあわせて楽しめます。 利用規約:https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ プライバシーポリシー:https://8000000.co.jp/wp-content/uploads/2025/06/【プライバシーポリシー】八百万ホールディングス株式会社_20250612.pdf レース後は、ラップタイム、セクタータイム、ピット情報を確認でき、レーサー自身の振り返りや詳細な分析にも活用できます。 主な機能: ■ レースを探す • サーキット検索 • 開催日ごとのレース一覧表示 • Liveレースの表示 • 開始時刻順、レース名順での並び替え ■ リアルタイム観戦 • リアルタイムのレース結果表示 • コース図上でのドライバー位置表示 • アニメーションによるレースシミュレーション • 更新された順位やタイムのハイライト表示 • 順位変動時の通知音 ■ レース後の分析 • ラップタイム、セクタータイム、ピット情報の確認 • ドライバーごとの詳細データ表示 • ベストラップの強調表示 • 他クラス、ヒートとの比較 • レーサー自身の振り返り分析 ■ ログイン・利用方法 • Googleアカウントでログイン • Appleアカウントでログイン • ゲストモードでの利用
Screenshots
Verdict
The clearest difference is update cadence: RaceWatch at every 3 weeks against DsStopWatch's every 2 months. DsStopWatch's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
DsStopWatch ships an update every 2 months, RaceWatch every 3 weeks. The most recent releases landed on September 27, 2026 and September 11, 2026 respectively.
| Parameter | DsStopWatch | RaceWatch |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 9 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryuichi Kato | YAOYOROZU HOLDINGS, INC. |
In-app purchases
DsStopWatch
No in-app purchases
RaceWatch
No in-app purchases









