Hz Lab vs Multi

Hz Lab puts mosquito tones, speaker water eject and a frequency generator into one simple tool. No ads. No subscription. The paid features are a single one-time purchase. MOSQUITO TONE Nine steps from 8,000Hz to 20,000Hz, playing the moment you tap. Every step is free. Each frequency comes with a rough guide to the age that usually still hears it, which makes it easy to compare with friends and family. HEARING CHECK Tones play from low to high and you answer "I hear it" or "I don't". You get a rough idea of where your hearing tops out. WATER EJECT For when water gets into the speaker. Pulsed low tones around 165Hz move the diaphragm far enough to help push droplets out. A countdown and waveform show you exactly how long is left. FREQUENCY GENERATOR Anything from 20Hz to 20,000Hz, by slider or by typing the number. The full range is free with a sine wave. SOLFEGGIO AND BINAURAL BEATS Solfeggio frequencies from 174Hz to 963Hz, plus binaural beats that play slightly different tones in each ear. HZ LAB PRO (one-time purchase) - Tune in 1Hz steps - Square, triangle and sawtooth waveforms - Strong and quiet water eject courses, with adjustable timing and range - Full control over binaural beats - All nine Solfeggio frequencies - Unlimited presets (the free version keeps three) - Sleep timer and background playback - Hearing check history and per-ear testing Pay once and keep it. Nothing auto-renews. WHAT WE TELL YOU UP FRONT - The iPhone's built-in speaker drops off sharply above about 16,000Hz. Use headphones for high frequencies. The app says the same thing. - Water eject does not guarantee that all water is removed, does not improve water resistance, and does not repair a water-damaged device. - The hearing check and age guidance are informational only, not a substitute for a medical hearing test. PROTECTING YOUR HEARING High tones rarely feel loud but still strain your ears. By default Hz Lab caps the volume above 15,000Hz and while headphones are connected (adjustable in Settings), and playback stops automatically if your headphones are unplugged. PRIVACY No account needed. No personal data is collected at all. No advertising or analytics SDKs. Presets and hearing check results stay on your device.

A timer in one app, a counter in another, and you lose count while switching between them. Multi-Module Counter puts all of it on one screen. ■ Eight kinds of units, as many as you like • Countdown — keeps counting the overtime after it hits zero • Stopwatch — with laps • Interval — work and rest, round after round • Chess clock — two players, tap to switch turns • Counter — name it, color it, count with + and − • Scoreboard — 2 to 4 teams side by side • Level meter — crowd level in dB with peak hold • Buzzer — gather around the phone; the first color to tap wins Units come in 1×1 and 2×1 sizes. Timers can show a bar or a ring. ■ One start. Everything runs. The three keys at the top control the whole board. Link units, like locking a counter the moment a timer runs out, and you get an exact count of what happened within the time. ■ Save a layout for every occasion Charades, workout, board game, cooking, quiz. Start from a preset, then save and switch your own layouts. ■ Readable from across the table Big, heavy, monospaced digits you can read with the phone in the middle of the table. Works in portrait and landscape. The last 10 seconds are shown in color and sound (sound can be turned off). ■ Keep and share results Stop the board and every unit’s final value lands on one result card. Share it as an image. ■ Free Up to 4 units, 2 layouts and 20 results. One small banner at the bottom of the screen, never on the board, plus a full-screen ad only at natural breaks such as when a timer ends or the board is stopped. ■ Pro (one-time purchase) • Unlimited units, layouts and results • iCloud sync • Ads and share-image watermark hidden No subscription, no free trial, no upsell. ■ Please note The level meter uses the phone’s microphone and is indicative only. The buzzer judges tap order on a single device. Languages: English, Japanese, Chinese (Simplified & Traditional), Korean, Spanish, Portuguese (Brazil)