# Gas & Oil — 2-Stroke Fuel Mix Calculator > 2-stroke fuel mix calculator and equipment manager for outdoor engines. (iPhone/iPad app by KVC, Inc..) - Source: https://appshunter.io/ios/app/gas-and-oil/id350197332 (this page in markdown: same URL + `.md`) - Developer: [KVC, Inc.](https://appshunter.io/developer/350197335) - Category: Utilities, Reference - Price: $0.99 - Rating: 3.90/5 from 19 App Store ratings · 15 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 7 MB - Languages: American English - Released: 2010-01-15 - Data updated: 2026-10-14 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/gas-and-oil/id350197332/reviews.md ## What is Gas & Oil? Mix it right the first time. Gas & Oil works out the gas-to-oil ratio for any 2-stroke engine — chainsaw, trimmer, blower, outboard, dirt bike, generator — and then remembers every machine you own so you never have to work it out twice. THE CALCULATOR Pick a ratio, enter how much gas you have, and read the oil. Or go the other way: enter the oil left in the bottle and see how much gas it mixes with. Both directions, always in view. • Common ratios one tap away — 16:1, 24:1, 25:1, 32:1, 40:1, 50:1, 100:1 — or type any ratio • US gallons, Imperial gallons or litres for gas • US ounces, Imperial ounces, millilitres or litres for oil • Oil figures always round UP. Too little oil can seize an engine; a little extra only fouls a plug YOUR EQUIPMENT Every machine you own, each with its own mix ratio. Tap a machine's ratio and the calculator is set for it — no remembering which saw is 50:1 and which trimmer is 40:1. • A photo of each machine, so you know which one you're looking at • Spark plug, air filter, fuel filter and blade or line part numbers — the reason to open this app in a hardware-store aisle • A service history: what you did, when you did it, and the hours on it • Notes for anything else worth remembering BUILT TO BE USED OUTDOORS • Works completely offline. No signal needed in the back forty • Large, high-contrast numbers, plus a text-size setting that scales the whole app • Light and dark, following your phone or pinned to whichever you prefer YOUR DATA STAYS YOURS There is no account, no sign-up, and no server. Nothing you enter ever leaves your phone — this app makes no network calls at all. That also means a lost phone is a lost list, so you can export a backup file any time and restore it on a new phone. FROM 2009 Gas & Oil first shipped in 2009 and was sold in 27 countries. This is the same app, rewritten from scratch for modern iPhones. Always check the figure against your machine's own manual the first time you mix for it. ## Key features - 2-stroke fuel mix calculation - Stores equipment with custom ratios - Supports various measurement units - Offline functionality - Service history tracking - Part number storage ## Is Gas & Oil safe? Not enough ratings yet to assess Gas & Oil. ## Is Gas & Oil legit? Gas & Oil appears to be a legitimate app. The AppsHunter Legitimacy Score for Gas & Oil is 90 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (10 of 15) All indexed reviews: https://appshunter.io/ios/app/gas-and-oil/id350197332/reviews.md ### 1/5 — Ripoff *2017-12-06* Refund me ### 1/5 — RIP OFF ARTIST HERE Total waste of money *2015-08-23* App does nothing but sit there with a blank page, and has been that way for over a month since I purchased. No updates available to fix it either. DONT WASTE YOUR MONEY ON THIS ONE Author should refund $ or fix the app. As it stands now, he is just ripping people off as app will not work on an up to date iphone 6 ### 1/5 — Do not buy *2015-01-31* This app does not work on iPhone 5s with IOS 8.1.3 Opens to a screen expecting to add inventory but no buttons function. ### 1/5 — Does not work *2014-12-27* I bought this app on a iPhone 6 and it does not work. ### 5/5 — Better than the others!  *2010-05-31* Great app does everything it says. The best part is being able to store your different toys and tools in here because you and I both know it's btch to remeber what mixture they all take ### 5/5 — The handiest app on my iPod! *2010-03-23* I used to have a piece of masking tape on all of my 2-stroke equipment with the mixture written on it! This app takes all of the guess work out of the process when you are standing with a gas can in front of you, and a bottle of 2-cycle oil in your hand! The note feature is another nice touch. Reminds me when it is time to service that particular piece of equipment... as a matter of fact, I even use that feature for my 4-stroke equipment like my garden tractor! There are a lot of applications that will do that for your car, but this is the one to have for all of the other engines you have in your fleet! ### 5/5 — A great app for a great price! *2010-03-09* Math on the fly has never been an ability of mine, which makes this app a life saver. Each little engine I have takes a different mixture, ratios which I always either forgot or confused with something else. This application easily solves both of those problems for me. A great app at a great price! ### 5/5 — Very Cool App *2010-03-01* Very useful to have because when you have a fixed quantity of oil in a bottle this app makes it so much easier for you to know how much gasoline to add to that quantity of oil. Great to able to catalogue multiple machines with different mixture ratios. Thanks KVC... ### 5/5 — Extremely Helpful *2010-03-01* This application is extremely helpful! With all of the 2 cycle motors in the garage having the gas to oil mix information in one place is great. The photos help when my family needs to gas up they just check the photo with the right gas can mix. ### 5/5 — Great app!! *2010-02-28* What an awesome app!!! Recommended!!!!! ## Frequently asked questions about Gas & Oil ### How does Gas & Oil calculate fuel mix? Gas & Oil allows you to select a common ratio or input a custom one. You can then enter the amount of gas you have to determine the required oil, or vice versa. The app ensures oil figures always round up to prevent engine damage. ### Can Gas & Oil remember my equipment? Yes, you can add each machine you own to the app, assign it a specific mix ratio, and even add a photo. This feature eliminates the need to remember individual ratios for different devices. ### Does Gas & Oil work offline? Yes, Gas & Oil is built to be used outdoors and works completely offline. No internet signal is required, making it convenient for use in remote locations. ### What information can I store for my equipment? Beyond the mix ratio, you can store part numbers for spark plugs, air filters, fuel filters, and blades or lines. It also includes a service history to log maintenance performed and hours of use. ### Is my data safe with Gas & Oil? Your data stays yours. The app has no account, no sign-up, and makes no network calls. All entered information remains on your phone, but you can export a backup file. ### How often is Gas & Oil updated? Gas & Oil was last updated on 2026-09-28 to version 2.0. The app was originally released in 2010 and has been rewritten for modern iPhones. ### What devices does Gas & Oil support? Gas & Oil is available for iPhone and iPod. It has an age rating of 4+ and is priced at $0.99. ### Does Gas & Oil have ads? No, Gas & Oil does not contain advertisements. It is a paid application with no in-app purchases. ## Version history (last 4 releases) ### 2.0.1 — 2026-10-03 Settings: unit names no longer cut off at larger text sizes. ### 2.0 — 2026-09-28 Gas & Oil is rebuilt from scratch, 17 years after the original. • Every machine you own in one place — each with its own mix ratio, photo, part numbers and service history • Tap a machine's ratio and the calculator is set for it • Works both directions: gas to oil, or oil to gas • US gallons, Imperial gallons and litres; US ounces, Imperial ounces, millilitres and litres • A text-size setting that scales the whole app, for reading it in bright sun • Light and dark, following your phone or pinned • Export a backup file any time Still completely offline. No account, no server, and no network requests of any kind. ### 1.1 — 2010-01-22 Fixed opening graphic, Optimized opening code, Removed the sample Items being installed during new purchase. ### 1.0 — 2010-01-15 No release notes. ## More apps by KVC, Inc. - [Get Prayer Chain](https://appshunter.io/ios/app/get-prayer-chain/id6805550168) - [DiveOps](https://appshunter.io/ios/app/diveops/id6812033235) All apps by KVC, Inc.: https://appshunter.io/developer/350197335 ## Related topics [premix](https://appshunter.io/ios/topics/premix) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-14.*