Gas Rater app for iPhone and iPad 4.4 ( 5344 ratings ) Utilities Reference Developer: Valsoft 3.99 USD Current version: 3.0.0, last update: 7 years ago First release : 13 Apr 2012 App size: 4.45 Mb Gas Rating domestic gas meters up to 6 cubic metres for U6,E6 and G4 gas meters using natural gas