21 calculators · rounds and turnover log · works with no signal

The pocket tools you actually use on the job.

One installable web app for the technician and the operator. Superheat and subcooling, steam tables and blowdown, voltage drop and conduit fill; and a rounds log that flags a reading against the limits you set and hands the shift over on one sheet. Enter your key once. It works offline from then on.

Open the app → See pricing →

The link opens the real app. Every screen works; every result is blurred until a key is entered. Look before you spend six dollars.

Field Tools · $6

Three tabs. Every result shows its method.

HVAC

  • Superheat and subcooling, ten refrigerants including R-454B, R-32, R-448A, R-449A, R-513A
  • Target superheat for fixed-orifice systems
  • PT chart, bubble and dew for blends
  • Temperature split, airflow from temperature rise
  • Pressure, temperature, flow and energy conversions

Boiler

  • Saturated steam tables by pressure or temperature
  • Blowdown rate and cycles of concentration
  • Boiler horsepower from steam rate and feedwater
  • Fuel-to-steam efficiency
  • Safety-valve capacity check, water-treatment ranges by pressure class

Electrical

  • Voltage drop, with the smallest size that meets 3%
  • Conductor ampacity with ambient and bundling corrections
  • Motor full-load current by HP and voltage
  • Box fill and conduit fill, with the smallest conduit that passes
  • Ohm’s law single and three-phase, transformer current

Refrigerant and steam properties are computed from the open-source CoolProp and IAPWS-IF97 formulations, not copied from a printed chart. Electrical screens follow the standard methods and say so; the adopted code and the manufacturer’s data govern. These are numbers, not instructions.

Rounds & Turnover Log · $6

A reading on its own means almost nothing. Against yesterday it means everything.

Set up your site once

Equipment list across eleven areas from substation to housekeeping, 12- or 8-hour shift. Enter your own low and high limits from OEM data and design basis. The app ships with no limits, because the limits are yours.

Take the round on a phone

Actual values, not ticks. A reading outside your limits turns red. The change since last round sits under every entry, so drift shows before an alarm does.

Hand over on one sheet

Fifteen-row plant status snapshot, abnormal conditions and what was done, open work and permits, lookahead, two-name sign-off. The last round’s out-of-limit readings are pulled onto the sheet automatically.

Stays on the deviceNothing is uploaded. No account, no server, no sync.
Exports to a spreadsheetOne row per round, one column per reading, in your setup order.
Backs up and restoresOne JSON file carries setup, rounds and handovers to any phone.
PrintsThe handover sheet prints clean for the binder.
Pricing

One payment. Permanent. Unlimited devices.

Free with every Alpha 360 training plan. Not training with us? Buy it on its own below.

Field Tools

$6

All 21 calculators across HVAC, Boiler and Electrical.

🔒 Store opens 1 November Licence key by email on purchase.

Rounds & Turnover Log

$6

Site setup, rounds against your limits, handover sheet, history, CSV and backup.

🔒 Store opens 1 November Licence key by email on purchase.

Field Tools + Log

$10save $2

Both, unlocked with one key.

🔒 Store opens 1 November Licence key by email on purchase.
How it installs

No app store. No download. No account.

1. Open the address on your phone

The app is a web page that behaves like an app. Chrome, Safari, Edge, any of them.

2. Enter the key from your receipt

Tap the Key tab, paste the key. It checks once online and remembers.

3. Add to Home Screen

Your browser’s share or menu button. From then on it opens like any other app and works with no signal.

Clearing your browser data removes the key from that device; re-enter it from your receipt. Lost the receipt? Contact us with the email you bought with.