Strobe Light vs decibella 2

Strobe Light - RPM turns your phone into a powerful tool for measuring the speed of rotating objects. The app works like a digital tachometer and offers two measurement modes: Strobe Light and Camera. You can measure the RPM of fans, motors, wheels, and other rotating devices without touching them. In both modes, the same stroboscopic principle is used. When the flash rate or camera frame rate matches the speed of the object, it creates the illusion that the object is standing still. This helps you visually determine the exact rotational speed of the object with high accuracy. Strobe Light Mode Using your phone's flashlight, this mode flashes light at the object in a specific pattern. It works best in a dark or low-light environment and is ideal when you want a quick RPM reading with the built-in flashlight. How to Use (Strobe Light): Mark the rotating object with something visible (a sticker or tape works well). Point your phone's flashlight toward the object. Turn on the strobe using the power button. Adjust the strobe speed using the + and - buttons until the object looks still. The RPM shown on the screen is the object's rotation speed. You can save the reading for later reference. Camera Mode Camera mode uses your phone's camera to show a live preview at a set frame rate (FPM — Frames Per Minute). When the frame rate matches the object's RPM, the rotating object appears frozen on screen. This mode is useful in well-lit conditions when you want to see the object clearly while tuning the speed. How to Use (Camera): Open Camera mode from the home screen and allow camera permission. Point the camera at the rotating object. Adjust the frame rate using the + and - buttons until the object looks still. The value shown on the screen is the object's RPM. Use the flash button if you need extra light in darker areas. Save or reset your reading anytime from the bottom buttons. Where It's Useful: Mechanics: Test fans, engines, or motors by measuring RPM. Education: Ideal for physics experiments that require RPM measurements. Industrial Use: Check the condition of rotating machinery. Calibration: Ensure rotating devices are running at the correct speed. Maintenance: Compare readings over time using saved history. Key Features: Two Measurement Modes: Choose Strobe Light or Camera from the home screen based on your environment and preference. Adjustable Strobe Speed: Set the strobe from 1 to 10,000 RPM for accurate measurements. Camera Frame Rate Control: Set camera preview from 30 to 14,400 FPM for precise visual tuning. Quick Adjustment Buttons: Easily change the speed with buttons for +1, +10, +50, or +100 RPM increments in both modes. Flash Sync (Strobe Light): Ensures the light flashes at the correct frequency for accurate RPM readings. Built-in Camera Flash (Camera Mode): Toggle the flash on or off for better visibility in low light. Save and Reset: Save current RPM readings with a custom title or reset to default anytime. History Tracking: Save and review your RPM data anytime for easy access from the menu. Works in Different Lighting: Strobe Light works best in the dark; Camera mode works well in normal and low-light conditions. Simple and Energy-Efficient: The app's interface is easy to use and designed to be practical for everyday measurements. Visual Tachometer: Acts just like a real tachometer using visual strobe techniques with your phone's flashlight or camera. Strobe Light - RPM makes it simple to measure RPM without any special tools or equipment. Whether you prefer the classic flashlight strobe method or the new live camera preview, this app gives you flexible and accurate RPM measurement in one place. Perfect for mechanics, hobbyists, students, and professionals alike. Contact us at: zsmapps2024@gmail.com Terms of use: Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Decibella 2: Sound Level Meter & Decibel Meter Explore the sounds around you with Decibella 2, a portable noise meter and sound analyzer for your phone or tablet. Measure everyday sound levels in decibels (dB), follow changes over time, and compare low, mid and high frequencies in one easy-to-use app. At home, in an office, library, café or on public transport, turn curiosity about your acoustic environment into clear visual information. REAL-TIME SOUND MEASUREMENT Tap the microphone button to start. Watch the animated meter, current dB value, average (AVG) and maximum (MAX). The average accounts for sound energy and measurement duration to summarize your session. TIME AND FREQUENCY GRAPHS Use dB/Time to follow sound-level changes. Switch to dB/Freq to explore 11 frequency bands labeled from 32 Hz to 20 kHz, including separate 15K and 20K bands. Live bars show the current spectrum, while gray markers show retained band maxima. The measurable range depends on your device's microphone. SOUND GUIDE Relate measured levels to familiar everyday sounds. Clear examples, readable text and a highlighted row help you understand the approximate meaning of a noise level. UP TO 100 MEASUREMENT RECORDS Review session duration, maximum and average dB in Records, with dates and times shown in your current language and regional format. Eligible sessions lasting at least one second are saved when measurement stops. Keep the latest 100 records; each new record beyond the limit automatically replaces the oldest. MICROPHONE CALIBRATION Adjust the dB offset from -20.0 to +20.0 in 0.1 dB steps. Fine-tune readings against a suitable reference meter. Permission and measurement-start errors are explained on the calibration screen. MADE FOR PHONES AND TABLETS Responsive cards, graphs, text and controls adapt to the screen. Choose a light or dark theme and use the app in English, Korean, Japanese, Simplified Chinese, Traditional Chinese, French or Spanish. A PLAYFUL VIEW OF SOUND Watch a small rocket respond to sound and travel toward the moon. It adds a visual touch to everyday sound exploration. ACCESS AND MEASUREMENT NOTES Basic measurement sessions are limited to 30 seconds. Earning a reward by watching a video ad unlocks longer measurements, Sound Guide and record saving/viewing for two hours. An internet connection and an available ad are required for this access. Measurement requires microphone permission and runs while the app is active; leaving the app or locking the screen stops it. Decibella 2 is for everyday reference and entertainment. Readings vary with the microphone, device and calibration. It does not replace certified professional or industrial sound-level equipment. Download Decibella 2 and explore everyday sound with a pocket-sized decibel meter. Made with love in Canada.