Would you like to know resistance of Coil you going to build ?
Vape Tool Features:

Coil Calculator: help you calculate perfect coils. Support multi-coil setups, types like Clapton Coil, Parallel Coil, Twisted Coil, and diffrent wire materials, Steam Engine feature.
Sweet Spot Finder: Shows you the wattage sweet spot for your coil setup.
Battery Life: allows you to calculate estimated runtime on your mechanical mods and estimated puffs
Ohm Law calculator: based on ohm law, you will be able to calculate Voltage [V], Resistance [Ω], Current [A], Power [W]
AWG converter: provide easy conversion from AWG to mm

What's New

Version 1.1

-Enabled pro version in-app purchase
-Fixed bug when calculating wraps based on resistance

Ratings and Reviews

3.8 out of 5
59 Ratings
59 Ratings
uber toon

Just Wow!

This app is so well designed, easy to use, and thorough that it's ridiculous. Descriptions and pictures of various coil types and building parameters are extremely nice to see. There is actually a photograph of a coil with the leg section highlighted red so you can determine your leg length. Leg length affects your end resistance and a new builder may not know that. I've been building for years and while I'm not a pro by any stretch I tend to know whats going on. What this app does is allow me to know the resistance outcome before I even start the build.

Another thing to note here is that it isn't just a build guide. There is also an Ohm's Law calculator, battery database (with pictures), converter (AWG/Inch/Temperature), and battery life. All things you need to have on hand when building and doesn't require firing up another app devoted to just one of those things. The more I use it the more I love it plus it doesn't beat you over the head with "rate this app" pop ups. In fact, I couldn't even find a link in it to take me to the app store to give one. I stopped what I was doing to make time and write this because it is so well done people need to know.

Cannot recommend this highly enough. No, I do not have any affiliation with this app or maker. Just an end user who is very pleased.


Just excellent

Amazing app, I most like that you can save builds and take pictures of them and put notes down ("wicked too tight, coil gunks with this juice, etc"). You can also use those saved builds as a starting point for new ones, use this feature constantly.

I'm running RTAs with 316L, so I can quickly play around with what sort of build will be the right resistance and physically fit in my tank without having to actually spend any time building. Especially nice when you're building parallels or more complex setups.

Ohm calculator has been dead on every time. Free version has more abilities than I'll ever need and doesn't have any ads or popups.



As someone new to building, this app is fantastic. It has pictures describing specific coils and really simplifies many different builds. I like that it shows recommended wattage, amps used, and all the other features that I am currently forgetting. Thanks for making this!


Stanislaw Baranski
86.6 MB
Requires iOS 8.1 or later. Compatible with iPhone, iPad, and iPod touch.
English, Arabic, Bulgarian, Czech, Danish, Dutch, Estonian, French, German, Greek, Hungarian, Indonesian, Italian, Japanese, Korean, Latvian, Polish, Portuguese, Romanian, Russian, Slovak, Spanish, Swedish, Traditional Chinese, Turkish, Ukrainian
Age Rating
You must be at least 17 years old to download this app.
Frequent/Intense Alcohol, Tobacco, or Drug Use or References
Unrestricted Web Access
© stasbar
In-App Purchases
  1. Pro Version $2.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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