Crisp: Speaker Test & Tone
Water Eject & Speaker Clean
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Eject water from iPhone speakers in 3 minutes. Generate any tone from 20Hz to 22kHz.
Test bass, mid, and treble. 100% offline. Lifetime purchase available.
What does Crisp do?
Crisp generates precise audio frequencies to eject water from your iPhone speakers, test speaker quality, and dislodge dust from speaker grilles.
Is my data private?
100% offline. Nothing leaves your iPhone. No accounts, no analytics, no ads, no tracking.
How do I get started?
1. Place your iPhone face down on a soft surface
2. Set volume to maximum
3. Tap Start Eject and wait 3 minutes
What can I do with it?
- Eject trapped water using a 165Hz tone — the proven frequency for speaker vibration
- Generate any tone from 20Hz to 22kHz with sine, square, triangle, or sawtooth waveforms
- Test speaker frequency response with bass (80Hz), mid (1kHz), and treble (8kHz) presets
- Run stereo balance tests on left and right channels
- Sweep frequencies automatically to dislodge stubborn dust particles
- Save your favorite frequencies for one-tap recall
What devices does it work on?
iPhone running iOS 17 or later. The same audio principles work on any built-in speaker.
Why use Crisp?
Speaker grilles trap moisture from sweat, rain, pool splashes, and humidity. Dust and pocket lint accumulate over time. Crisp uses sound vibration — the same technique built into Apple Watch — to physically dislodge particles without opening your device or using cleaning tools that can damage internal components.
Does it really work?
Sound vibration ejection is a well-documented technique. Results depend on how much water is trapped and how recently. For best results, run the cycle within an hour of water exposure, repeat 2 to 3 times, and keep the device face down throughout.
How much does it cost?
3-day free trial, then $1.99/week, $4.99/month, $29.99/year, or $79.99 lifetime. Cancel anytime in Settings.
Terms of Use: https://taxlite.net/crisp/terms.html
Privacy Policy: https://taxlite.net/crisp/privacy.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Welcome to Crisp!
• 165Hz water eject mode with 3-minute auto cycle
• Frequency generator: 20Hz to 22kHz, four waveforms
• Speaker test: bass, mid, treble, full range, stereo balance
• Auto-sweep mode for dust removal
• Save and recall your favorite frequencies
• Background playback with Lock Screen controls
• 100% offline — no data collection, no ads, no tracking
Start with a 3-day free trial.
The developer, ZHENGQIAO JIANG, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ZHENGQIAO JIANG
- Size
- 1.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 5 more
- English, French, German, Japanese, Korean, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime $79.99
- Yearly $29.99
- Monthly $4.99
- Weekly $1.99
- Copyright
- © Alex Jiang 2026