Saturon: A2L PT Chart
R-454B & R-32 charge calc
Only for iPhone
$7.99 · Designed for iPhone. Not verified for macOS.
iPhone
No subscription, ever. Full A2L data—R-454B, R-32, R-454C—with bubble & dew done right. Superheat, subcooling, charge & airflow. Pay once, 100% offline.
The offline HVAC charging toolkit built for the A2L era. Right number at the unit — R-410A through the new low-GWP refrigerants R-454B, R-32 and R-454C — and never a subscription.
NO SUBSCRIPTION. Pay once, yours forever. No ads, no account, no Bluetooth, no signal needed.
EVERY REFRIGERANT, INCLUDING A2L
• PT charts for R-410A, R-22, R-454B, R-32, R-454C, R-404A, R-134a, R-407C, R-290
• Bubble AND dew columns — so glide is correct on R-454C, R-407C and every blend
• Superheat reads off dew, subcooling off bubble — the way the physics actually works
CHARGE IT RIGHT
• Measured superheat and subcooling, glide-routed per refrigerant
• Target superheat for fixed-orifice systems
• Airflow / CFM (1.08 × CFM × ΔT) with the 400 CFM/ton check
WORKS IN YOUR UNITS
• °F / psig or °C / bar — one tap, remembered
BUILT FOR THE FIELD
• Big numbers readable at arm's length, gloves on
• Live results — no "calculate" button
• 100% offline, in any basement or parking lot
EVERY NUMBER SOURCED
Refrigerant data from NIST REFPROP-lineage equations of state (CoolProp), cross-checked against ASHRAE 34 and manufacturer charts — version-stamped and cited in the app. A reference aid: always confirm against the equipment's charging chart and nameplate.
For service techs, installers and apprentices working the R-410A → A2L transition.
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The developer, Karolis Valatka, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Karolis Valatka
- Size
- 1.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 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+
- Copyright
- © 2026 Karolis Valatka
