You take care to get your equipment and fuel details right. Thank you for using Gas / Oil. This update adds small engine and scooter references, expands the chainsaw guide, and puts Help, Reset and save feedback closer to the work you are doing.

NEW SMALL TWO-STROKE ENGINE REFERENCES

- Browse 27 profiles covering handheld tools, scooters, outboards and selected legacy mowers and snow tools.
- Find 10 scooter profiles, including Yamaha, Honda, Piaggio, Vespa, Genuine, Peugeot and KYMCO models.
- Look up STIHL, Husqvarna, ECHO, Shindaiwa, RedMax and Makita tools.
- Search by brand, model code, engine family, use or oil system.
- Filter and group results to narrow your search.
- Read model-specific oil requirements, year or serial details and break-in conditions.
- Distinguish premix engines from scooters with a separate oil tank.
- Open the manufacturer source from each profile.
- Open scooter references from the iPad Reference sidebar.

MORE CHAINSAW INFORMATION

- Browse 45 chain profiles with manufacturer links.
- Find expanded Carlton and STIHL model guidance.
- Search by chain code, manufacturer, pitch or file size.
- Find specialist, low-profile, carbide and legacy guidance.
- Measure pitch across three rivet centers and compare drive-link thickness.
- Convert inch fractions and millimeters without choosing a file from pitch alone.

HELP WHEN YOU NEED IT

- Open Help beside calculators, forms and reference screens.
- Read longer explanations on their own screen.
- Keep the main screen focused on entries and results.
- Find formulas and the complete calculator guide in More.
- Review the difference between oil injection and gasoline injection.

RESET AND SAVE WITH CLEAR FEEDBACK

- Reset a calculator to its starting values without deleting saved history.
- Reload the latest saved values in record and equipment editors.
- Reset search filters and transfer choices without clearing your database.
- See a brief confirmation after a successful save.
- See one save banner at a time, even in an editor.

YOUR MACHINES AND FUEL, TOGETHER

- Save machine names, photos, checked ratios and preferred units.
- Name containers and enter their permitted fill limits.
- Keep mixing dates, fuel, oil, additives and intended equipment with each batch.
- Check estimated finished mixture volume, including oil and additives.
- Review days since mixing and choose an optional fuel review alert.
- Mark a batch used up or a can emptied while keeping its history.
- Start a new draft with Mix again.
- Create PDF or PNG labels with the container, ratio, date and contents.

CALCULATE, CONVERT AND FIND RECORDS

- Use one converter with 41 units across six categories.
- Calculate additive doses or fuel quantity from available mixing oil.
- Search saved calculations and batch history.
- Combine type, status and date filters, then choose a sort order.
- Keep browsing as records load automatically.
- Follow related records in iPad sidebars and detail views.
- Choose Light, Dark or Follow System.

MORE OPTIONS FOR YOUR DATA AND WATCH

- Export entity data as CSV or transfer saved items as JSON.
- See total saved items and counts for each record type.
- Skip matching items when importing again.
- Transfer up to 10,000 items, with a separate 100 MB JSON limit.
- Use all 16 Watch tools without Pro or a nearby iPhone.
- Save, share and reset Watch calculations with unlimited calculator use.

Try 50 free calculations on iPhone and iPad. Monthly or lifetime Pro adds unlimited calculations, record management and fuel workflows. Watch records stay on the Watch and do not sync to the phone. Always check your exact machine's instructions. Fuel review dates do not establish safety or expiry.

Updates for iOS 18
added efficiency calculators