DsStopWatch vs Kairos
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.
Kairos
This app helps shift workers and their families stay synchronized by providing a clear, shareable schedule. It allows users to easily track rotations, see real-time duty status, and receive notifications about upcoming shifts. Designed for professionals with complex schedules, it aims to eliminate guesswork and keep everyone informed.
- Shareable shift calendar
- Real-time duty status
- Customizable shift rotations
- Home screen widgets
- Apple Watch support
- Multiple calendar tracking
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Kairos is a premium shift calendar designed specifically for firefighters, medical professionals, police officers, industrial crews, and the families who support them. If you work a rotating schedule, you know how hard it can be for your spouse, kids, and friends to keep track of when you’re working, when you’re off, and when you'll be home. Kairos is built to keep your family in sync. With a clean, beautiful design, you can manage your complex shift rotation and easily share it. By sending a simple 6-character code, your loved ones can see your live schedule on their own devices. No more texting back and forth about who is on duty next weekend—everyone always knows your status at a glance. Simple Schedule Sharing - Share your calendar with a single code so family and friends always know your schedule in real-time. Track Multiple Calendars - Spouses and loved ones can easily switch between their own schedule and any shared schedules. At-a-Glance Status - Instantly see if your loved ones are working, off duty, on call, or on vacation. Shift Countdown - View exactly when a shift ends or when the next one begins. Home Screen Widgets - See duty status right from your phone's Home Screen without even opening the app. Apple Watch Support - Check current shift status, calendar, and count down the hours directly from your wrist. READY FOR ANY ROTATION Set up your calendar in seconds using common pre-set schedules (like Kelly, Panama, DuPont, 24/48, 48/96) or easily build your own custom weekly layout. Keep your family connected and take the guesswork out of shift work with Kairos! Subscriptions & Terms: Kairos Pro is available as an auto-renewable subscription: • Kairos Pro Monthly: $4.99 / month (1 month duration) • Kairos Pro Yearly: $49.99 / year (1 year duration) Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kairosapp.dev/privacy
Screenshots
Verdict
The clearest difference is rating: Kairos at 5.0 against DsStopWatch's 4.3. Kairos also leads on update cadence (every 2 weeks vs every 2 months). DsStopWatch's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 26.5). On price, ratings volume, 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. Kairos sells 2 in-app purchases, starting at $4.99 per month. DsStopWatch asks for nothing beyond the download.
Kairos holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively.
DsStopWatch ships an update every 2 months, Kairos every 2 weeks. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.
| Parameter | DsStopWatch | Kairos |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (3 ratings) | 5.0 (3 ratings) — better |
| Number of ratings | 3 | 3 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 12.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 9 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryuichi Kato | BOAZ TIMOTHY WHEALY |
Customer experience
DsStopWatch
Kairos
In-app purchases
DsStopWatch
No in-app purchases
Kairos
- Kairos Pro - Monthly$4.991 Month
- Kairos Pro - Yearly$49.991 Year
Questions
Is DsStopWatch free?
Is Kairos free?
Which has better reviews, DsStopWatch or Kairos?
Do DsStopWatch or Kairos have ads?
Which is updated more often, DsStopWatch or Kairos?
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