Water Flash vs Crisp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Water Flash
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WaveFlush: Test Your Speakers and Microphone with Precision WaveFlush is your all-in-one audio utility, designed to keep your device sounding sharp. Key Features with WaveFlush: • Speaker Test – Use WaveFlush to play a wide range of sound frequencies and check the clarity and balance of your speakers. • Microphone Check – Quickly verify if your microphone is working correctly with WaveFlush’s built-in testing tool. • Sound Level Meter – Measure decibels in your environment and monitor noise levels using WaveFlush’s accurate dB meter. WaveFlush Premium Upgrade: • Unlimited Frequency Testing – Explore the full spectrum of tones without limits. • Unlimited Noise Meter – Track sound levels endlessly with WaveFlush Premium. WaveFlush is simple, effective, and designed to help you keep your audio at its best. Auto-Renewable Subscription Terms Will be applied to your iTunes account when purchase is confirmed. Subscriptions will automatically renew unless canceled within 24 hours before the end of the current period. You can cancel at any time in your iTunes account settings. If you purchase a subscription, any unused portion of the free trial period will be forfeited. Cancellation will take effect the day after the last day of the current subscription period and you will be downgraded to free service.
Crisp
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Clear water. Test your speaker. Verify the result. Crisp uses targeted sound frequencies to help eject trapped water and dislodge dust from iPhone and iPad speakers. Then it listens with the microphone to compare real Before/After dB measurements—so you can check the result instead of guessing. NO ADS. NO ACCOUNTS. 100% OFFLINE. Is my data private? Everything runs on your device. Nothing leaves your iPhone or iPad. No accounts, no analytics, no ads, no tracking. How do I get started? 1. Place your device 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, or switch to Dust mode to shake out lint and debris - Choose Normal, Turbo, or Deep intensity for a faster or more thorough clean - Find your phone's exact speaker resonance point with Resonance Finder for a stronger clean - Compare a real Before/After dB reading, not just a guess, to confirm the cycle worked - Generate any tone from 20Hz to 22kHz — up to 30kHz in Ultrasonic mode — with sine, square, triangle, or sawtooth waveforms - Test speaker frequency response with bass (80Hz), mid (1kHz), and treble (8kHz) presets - Run stereo balance (left/right) tests on stereo-capable devices - Check your microphone for blockages with a one-tap diagnostic - Measure ambient sound level with the built-in dB meter - Sweep frequencies automatically to dislodge stubborn dust particles - Take a structured hearing test across the audible range and save your audiogram - Save your favorite frequencies for one-tap recall - Set a cleaning reminder and track your streak over the past 7 days - Ask Siri to eject water, hands-free - 100% no ads, ever — most speaker-cleaning apps are free with ads until you subscribe; Crisp never shows one What devices does it work on? iPhone or iPad 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? Download free. Optional Crisp Pro plans and any eligible introductory offer are shown in the app using your local App Store price. You can manage or cancel subscriptions anytime in Settings. Terms of Use: https://taxlite.net/crisp/terms.html Privacy Policy: https://taxlite.net/crisp/privacy.html
Screenshots
Verdict
The clearest difference is ads: Crisp at none against Water Flash's shown. Water Flash's advantage is update cadence (every 3 weeks vs every 2 months). On price, 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
Both are free to download. Water Flash sells 2 in-app purchases, starting at $4.99 per 7 days and Crisp sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Water Flash ships an update every 3 weeks, Crisp every 2 months. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.
| Parameter | Water Flash | Crisp |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 12 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Elena Anghel | ZHENGQIAO JIANG |
In-app purchases
Water Flash
- Weekly Subscription3 Days trial$4.997 Days
- Yearly Subscription$24.991 Year
Crisp
- Weekly$1.997 Days
- Monthly$4.991 Month
- Yearly$29.991 Year
- Lifetime$79.99









