Superheat Subcooling PT Chart
HVAC charging & PT chart
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Charge it right the first time: live superheat and subcooling with built-in PT charts for R-410A, R-32 and more — works offline in the field.
The HVAC tech's superheat & subcooling calculator — charge diagnosis and PT chart in one honest tool.
Pick the refrigerant, enter your gauge pressure and line temperature, and read superheat, subcooling and saturation temperatures live. Choose the charging method — TXV/EEV (subcooling) or fixed orifice (superheat) — and get a clear verdict against the target: on target, check, or off target, with the direction: add charge or recover charge. A built-in PT quick-look table shows saturation temperatures around your reading, with separate dew/bubble columns for zeotropic blends.
Works in °F/psi or °C/bar — one global toggle.
FREE
• R-410A with full superheat, subcooling and TXV charge diagnosis
• PT chart around your gauge reading
• Share results as text
PRO
• All 7 refrigerants: R-410A, R-32, R-454B, R-22, R-134a, R-407C, R-404A
• Fixed-orifice target superheat table (indoor wet-bulb × outdoor dry-bulb)
• Save readings to history
• Share clean PDF reports
Built for gloves and rooftop sun: big keypad, huge results, Outdoor Bright mode.
Everything stays on your phone — fully offline, no account, no tracking.
Results are a field aid; always verify targets with the manufacturer's data.
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Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://hdappstudio.com/superheatcalc/privacy/
Ratings & Reviews
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The developer, HD YAPIMCILIK VE TEKNOLOJI ITHALAT IHRACAT TICARET LIMITED SIRKETI, 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
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- HD YAPIMCILIK VE TEKNOLOJI ITHALAT IHRACAT TICARET LIMITED SIRKETI
- Size
- 10.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 10 more
- English, Arabic, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Superheat Pro — Lifetime $29.99
- Superheat Pro — Yearly $14.99
- Superheat Pro — Monthly $2.99
- Copyright
- © 2026 Ercan Onur Ensert