Features:
✓Offline mode.
✓Save calculations.
✓ Calculation of batches.
✓ Winding calculation.
✓ Share with another calculation on VKontakte.
✓ Tweets about the best batch.
✓ Post on the wall on Facebook.
✓ Share via Google+.
✓ Soft design.

Vape-helper is the perfect calculator for you.

Minimum advertising! Maximum functionality!