SprayBench: Model Paint Guide
Airbrush Humidity Checker
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Scale modeler? Check today's spray conditions by humidity, temperature, and dew point. Personalized to your paint type, task, and setup.
Stop guessing whether to spray today. SprayBench checks your local humidity, temperature, and dew point — then tells you if it's safe to paint based on your exact paint type and task.
Every scale modeler knows the frustration: a perfectly thinned Vallejo base coat blooms because the humidity was too high, or a lacquer clear coat blushes because the dew point was too close. The problem? Each paint category has different thresholds, and they change with every task.
HOW IT WORKS
1. Set up your paint profile: choose your paint category (Lacquer, Alcohol-Acrylic, Water-Acrylic, or Enamel) and your environment (indoor/outdoor, AC, dehumidifier).
2. SprayBench fetches your local weather conditions and calculates a Spray Score (0–100) based on humidity, temperature, dew point, and wind.
3. You get a clear GO, CAUTION, or SKIP verdict for today — personalized to your paint and task.
It takes 15 seconds to set up. No account required.
SPRAY SCORE
Your daily readiness score combines humidity, temperature, dew point proximity, and wind speed — weighted differently for each paint type. Water-based acrylics weigh humidity heaviest. Enamels weigh temperature more. The score accounts for what matters most to your specific paint.
CURRENT CONDITIONS
See today's humidity, temperature, dew point, and wind at a glance — each color-coded to show whether it helps or hurts your spray session.
PRO FEATURES
Upgrade to Pro for deeper insights:
- Task-by-task scores — see if Primer is GO while Clear Coat is SKIP
- Correction recommendations — specific retarder %, PSI adjustments, thinner ratios
- 7-day spray forecast — plan your weekend paint session in advance
- Hourly best window — find the ideal 3-hour block today
- Unlimited paint profiles — check Tamiya, Vallejo, and Mr. Color simultaneously
- All 4 indoor environment presets
- Session history log
PRIVACY FIRST
All data is stored on your device. No account, no tracking, no ads. Location is used only to fetch local weather data from Open-Meteo. Your coordinates are never stored on any server.
SprayBench is an informational reference tool for hobbyist scale modelers. Spray readiness scores and correction suggestions are estimates based on general community practices. Always perform test sprays before committing to your model. This app does not guarantee paint quality outcomes.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
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 .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Location
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- JUHWAN PARK
- Size
- 30.7 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.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro — Full Access $4.99
- Copyright
- © 2026 osk