FretCast: Guitar Humidity Care

Acoustic Wood Crack Prevention

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Acoustic guitar owner? See today's crack risk score based on local weather and your home profile. Daily humidity care guide for every wood type and storage method. Stop worrying about whether your guitar is safe right now. FretCast estimates your indoor humidity from local weather conditions and tells you exactly what to do today to keep your acoustic guitar healthy. Wood instruments crack, warp, and lose tuning stability when humidity drops too low or swings too fast. Repairs cost hundreds to thousands of dollars. FretCast gives you a daily risk score so you can act before damage happens. HOW IT WORKS 1. Set up your home profile: heating type, home age, and humidifier status. 2. Add your guitar: select top wood, back wood, and storage method. 3. FretCast checks your local weather, estimates indoor humidity, and calculates a personalized risk score from 0 to 100. It takes 30 seconds to set up. No account required. DAILY RISK SCORE Your risk score updates every time you open the app. It factors in estimated indoor humidity, rate of change over 24 hours, how long conditions have been outside the safe range, your wood type sensitivity, and your storage method. Color-coded from green (safe) to red (danger) with a clear action plan. ACTION PLAN Not just a number — FretCast tells you what to do. "Move to a hard case." "Run your humidifier for 2 hours." "Conditions are stable — play and enjoy." Specific guidance based on your situation today. INSTRUMENT PROFILES Different guitars need different care. A Sitka Spruce top on a wall mount reacts differently than a Cedar top in a hard case. Set up each instrument with its own wood and storage profile. PRO FEATURES Upgrade to Pro for deeper insights: - 7-day risk forecast calendar - Multiple instrument profiles (unlimited) - Rate-of-change humidity alerts - Humidifier run-time calculator - Tuning stability prediction PRIVACY FIRST All data is stored locally on your device. No account needed. Location is used only to fetch weather data from a public weather service. Your coordinates are never stored on any server. FretCast provides estimated humidity conditions based on outdoor weather data and user-provided home profiles. Indoor humidity readings are approximations. For precise monitoring, we recommend using a hygrometer. This app does not guarantee instrument safety and is not a substitute for professional instrument care advice. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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The developer, JUHWAN PARK, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

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Information

Seller
JUHWAN PARK
Size
30.3 MB
Category
Lifestyle
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 osk
  • Privacy Policy

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