CallNinja vs byeWatch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CallNinja
Read full descriptionHide full description
Stop repeated spam calls that keep the same local or area-code prefix while changing the remaining digits. CallNinja blocks user-selected number patterns through the iOS CallKit system. Enter a number from a call you personally confirmed as spam. The app shows the resulting pattern and count, and blocks it only after you review and activate it. [How to use] 1. Select your country. 2. Enable the needed extensions from Slot 1 through Slot 10 in Settings. 3. Enter the number from the confirmed spam call. 4. Review the displayed pattern and count, then activate blocking. Example: Enter 323-773-4540 → Blocks up to 1,000,000 numbers in the 323-77XX-XXXX pattern [Blocking criteria] CallNinja has no pre-populated or remote spam database and does not automatically classify calls. The user enters only a number from a call they personally confirmed as spam. The final six digits become wildcards, so the selected range may block up to 1,000,000 numbers. Legitimate numbers may exist in that range, so the user must review and choose the range. Any active range can be disabled or deleted at any time. CallNinja blocks phone calls only and does not filter SMS or MMS. [Key features] • Range blocking for repeated spam calls that change their trailing digits • Up to 10 ranges and 10 million numbers total • A contact can be blocked if it matches a range you activate, so review each pattern first • No background data collection by the developer; optional sync uses your private iCloud account [iCloud Sync] You can sync your selected country and saved phone-number patterns for every country across devices using the same Apple Account. The data stays in your private iCloud database, which the developer cannot access. Turning sync off keeps your numbers on this device. Enable the 10 CallNinja extensions separately in call blocking settings on each device. iCloud sign-in and iCloud Drive are required.
byeWatch
Read full descriptionHide full description
byeWatch — Eight instruments in a pocket watch A pocket watch that is more than a clock. byeWatch brings eight different instruments into a single pocket-watch-inspired interface. Instead of searching for buttons, interact with the watch like a real mechanical instrument. Turn the crown to move between instruments, and use the switches around the dial to control each one. ■ 8 INSTRUMENTS • Astronomical Track the Moon phase and tilt while the Sun and Moon move across the sky according to their actual altitude and hour angle for your location and date. • Chronograph A classic chronograph with 60-second, 30-minute and 12-hour subdials. Watch the mechanical movement through the window, with a moving weight that reacts when you shake the device. • World Clock Rotate the city drum to select a city and see its local time, date, weekday, UTC offset and time zone. • Stopwatch Measure time down to 1/10 second and record lap and split times. • Sunrise & Sunset See today's sunrise and sunset times and visualize the part of Earth currently illuminated by the Sun. Digital views include a 24-hour solar-altitude graph and an approximate tide curve. • Compass Points to true north rather than magnetic north. WMM 2025 coefficients are built into the app so magnetic declination can be calculated offline using your location and date. • Barometer & Altimeter Read atmospheric pressure in hPa and mmHg and monitor whether pressure is rising or falling. Devices with a barometric sensor can also display barometric altitude. • Metal Detector Uses the device's magnetometer to detect local magnetic anomalies and displays them as a relative proximity index. ■ INTERACT LIKE A WATCH Turn the crown left or right to switch instruments. Pull the crown downward to open settings. Use the 11 and 1 o'clock switches for instrument-specific controls. Use the 3 o'clock switch to reset. Swipe the dial left or right to enter digital mode. Swipe upward below the watch to reveal the information panel. Rotate the device horizontally to open the landscape information panel. ■ MAKE IT YOUR WATCH Customize the case color, dial color, hand design and index style. Choose from silver, platinum, graphite, steel, gold, champagne, brass, rose gold, copper, navy, blue steel and teal. Reorder the instruments or hide the ones you do not use. ■ ANALOG AND DIGITAL Each instrument has its own visual language. When an analog dial is not enough, switch to digital mode for detailed graphs, tables and readings. View solar-altitude graphs, pressure history, stopwatch lap records and a magnetic-anomaly scope. In landscape mode, additional information such as battery, pressure, temperature, solar path, sunrise and sunset, Moon phase and coordinates can be displayed together. ■ DESIGNED WITH OFFLINE USE IN MIND Location data is used on the device and is not transmitted outside it. WMM 2025 coefficients are built into the app, allowing magnetic declination to be calculated without an internet connection. ■ SENSOR REQUIREMENTS Compass and metal detector require a magnetometer. Barometer and altimeter require a barometric sensor. Sunrise/sunset and magnetic declination use optional location permission. If a required sensor is unavailable, the instrument can still be opened and the app displays an appropriate notice. ■ IMPORTANT NOTICE The metal detector is not a radar or professional metal-detection device. Its readings represent a relative magnetic proximity index, not a distance in meters. It must not be used for buried-object detection, safety inspections or professional detection work. byeWatch is a hobby instrument and is not intended for safety-critical navigation, aviation, surveying or other professional applications. Requires iOS 16.0 or later. Languages: 한국어 · English · 日本語 · 简体中文 · 繁體中文 · Deutsch · Français · Español · Italiano · Русский
Screenshots
Verdict
The clearest difference is price: CallNinja at Free against byeWatch's $2.99. byeWatch's advantage is update cadence (every 6 days vs every 3 months). On ads, in-app purchases, device support and iOS requirement 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
CallNinja is free to download; byeWatch costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CallNinja ships an update every 3 months, byeWatch every 6 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | CallNinja | byeWatch |
|---|---|---|
| Price | Free — better | $2.99 |
| Update frequency | Every 3 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 4 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | sunguk park | YOUNG SUK SOUL |
In-app purchases
CallNinja
No in-app purchases
byeWatch
No in-app purchases









