Stability improvements. After you pass a practice session or export a report, you may see a request to rate the app. Ratings help other technicians find it.

• Stability improvements: if something goes wrong, the app now shows a Try again button instead of a blank screen • Behind-the-scenes groundwork so future fixes can reach you faster Questions or corrections: Settings → Send Feedback.

• Ads no longer pop up while you're typing a reading. The calculators wait until you've finished entering numbers, and History saves one entry per reading instead of one for every digit • Watching an ad to unlock an extra mock exam now starts the exam, and its timer, only after the ad closes • If an unlock ad can't load, the mock exam unlocks anyway instead of leaving the button stuck Questions or corrections: Settings → Send Feedback.

• Fewer ads: the banner under the keypad on both calculator screens is gone • Anonymous usage stats so we can see which tools and practice modes get used — never your inputs, answers, or results. Switch it off any time in Settings → "Share anonymous usage stats" • Practice mode, the 50-question mock exam, and the R-454B field calculators are unchanged Questions or corrections: Settings → Send Feedback.

A2L Certification Test Prep — same field tools, now built around the exam. • NEW Practice mode: 300+ original exam-style questions on A2L / Low GWP refrigerant safety with explanations, fully offline. Quick 10, single-topic drills, and a 50-question mock exam with an optional timer. • Score by topic and review every miss. Progress stays on your phone. • Optional rewarded video ads unlock extra mock exams — never required. • Charging calculator, max allowable charge nameplate check, quick reference, and PDF job tickets are unchanged. Not affiliated with ESCO Institute, Mainstream Engineering, the EPA, or any certifying body. Questions or corrections: Settings → Send Feedback.

Nameplate check against the room charge limit with a clear Within / Exceeds result and margin Charge tier guidance (m1 / m2 / m3) plus optional active-mitigation limit, with GPS-stamped PDF job tickets when location is available

- Improved ad configuration and reliability - Minor bug fixes and behind-the-scenes stability improvements

• Small banner on A2L Quick Reference — same 100% free app, no paywalls • Refreshed store screenshots for R-454B / R-32 charging and max safe charge • Under-the-hood polish

-Updated tracking on ads platform

New field-ready calculator layout with an in-app keypad and one-tap Resume on the home screen Compare superheat/subcooling results to an optional OEM target from the nameplate

-Faster charging calculator — live superheat/subcooling results as you type, with a built-in keypad (no OS keyboard to dismiss) -Resume where you left off — home screen picks up your last tool in one tap -Clearer results — big hero readout with a typical-range band so you can see your reading at a glance -Searchable quick reference — find refrigerant specs, bubble/dew notes, and safety rules from one search bar

- Safe Charge Reports now fit cleanly on a single page - PDF reports show the correct app version and include a link to share the app - Enter negative line temperatures for low-ambient work - Smarter field entry: clearer error messages and "next" jumps straight to the following field

-Removed paywall

-Small updates to UI (header) -Added accessibility features