Merle vs Crisp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Merle
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Merle est le registre numérique pour inventorier, tracer et suivre les inspections de vos équipements techniques et de sécurité. Inventoriez vos extincteurs, détecteurs, portes coupe-feu, BAES, dévidoirs, ascenseurs, chaudières, VMC - et tout type d'équipement personnalisé. Tracez chaque intervention sur le terrain. Produisez un registre à la demande. VIGNETTES QR IDENTIFIANTES Chaque équipement reçoit un QR code unique. Scannez-le pour accéder instantanément à l'historique complet : pose, rondes, contrôles. APPLICATION MOBILE TERRAIN Trois workflows adaptés au terrain : • Pose initiale d'un équipement • Ronde interne • Contrôle par un prestataire agréé Chaque intervention est horodatée, géolocalisée et accompagnée d'une ou plusieurs photos. CHECKLIST DYNAMIQUE PAR TYPE Checklist adaptée à chaque type d'équipement. Les anomalies sont détectées automatiquement et signalées dans le tableau de bord. ALERTES AUTOMATIQUES Le cycle d'inspection est calculé selon le type d'équipement. L'app signale les échéances à planifier et les retards. TYPES D'ÉQUIPEMENTS PERSONNALISABLES Créez vos propres types d'équipements avec leur cycle d'inspection, leur checklist et leurs critères d'anomalie. REGISTRE PDF Générez à la demande le registre par site, regroupé par type d'équipement, avec l'historique complet des inspections.
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 in-app purchases: Merle at none against Crisp's 4. Merle also leads on update cadence (weekly vs every 2 months). On price, ads, 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. Crisp sells 4 in-app purchases, starting at $1.99 per 7 days. Merle asks for nothing beyond the download.
Merle ships an update weekly, Crisp every 2 months. The most recent releases landed on October 8, 2026 and October 18, 2026 respectively.
| Parameter | Merle | Crisp |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 14 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Mosa Data Engineering | ZHENGQIAO JIANG |
In-app purchases
Merle
No in-app purchases
Crisp
- Weekly$1.997 Days
- Monthly$4.991 Month
- Yearly$29.991 Year
- Lifetime$79.99









