No, "Login using Google/Facebook/etc." authentication, is safe because you never enter the password directly into the app. The app only knows that this third-party service (like Facebook or Google) proved that you are the owner of the account with email xyz@xyz.xyz. I trust this third-party service, third-party service trust you, so can I trust you that this email is yours.

If you were synchronized with cloud, your content is untouched. If you weren't, then you should have an auto backup that VapeTool does on every app exit in your device storage. in /storage/emulated/0/VapeTool/ folder. You can install the app again from https://vapetool.app/download_apk , go to Settings->Restore

Login to your Cloud account and your pro version should be restored. If you haven't used Cloud before, we need to activate your pro version manually. To do so, please send your purchase proof at restore-vapetool-pro@stasbar.com from the email you used to buy VT Pro on Google Play.

First of all we would like to explain why it's called Coil Builder and not Vape Tool. Apps in App Store has to have unique names and Vape Tool was already taken.
Second and more important is that Apple has banned everything related to Nicotine/Tabacoo/Vape/Ciggarete etc. so words like Vape are illegal. Unfortunately we had to hide (yes, it was already build and implemented) Liquid Blender and Cloud sections. We had to remove everything that suggested that may app is used in Vape context. We called to Apple support and told them that my app is about building coils for taking pictures and doing simple math, so they allowed me to publish first and the last 1.0 version.
At the moment every app that is related to Vape won't be deleted, but it also can not be updated. The Vape market on AppStore is frozen

Unfortunately restore button sometimes doesn't work, but AppStore is aware of your last purschase. So to restore your pro version on new iPhone, you must login on the same account that you used to buy Pro version before. Open Pro version popup window and act as you want to buy Pro Version again, AppStore will warn you that you have already paid for that, and will restore your Pro version for free. Sorry for the unconvenience, but as I mentioned in Why iOS differ from Android version ? I can't push update fix.

We aware of the fact that a lot of people is confusing how the Custom Type work. Currently we are working or improving UX, including more predefined builds (like zipper for example), and most important performance. It's quite laggy now when it comes to more complex builds, so it's our priority.

Example of Zipper Coil

Example Fused Juggernaut

1. (Recommended) Connect on both versions to Cloud service and let them synchronize
2. Via backups
   1. On Free version go to Settings tab -> Backup recipes -> press BACKUP
   2. On Pro version go to Settings tab -> Backup recipes -> press RESTORE

What does "Consume liquid" mean ? How it works ?

Consume system help you keep track of your flavors remaining amounts. We wanted to describe "consume" as action to reduce remaining amount of flavours that are used in the liquid.

Example

You have some flavors in you Favor Collection page.
Favor Collection before consume.

• ...
• Apple (TPA) 10ml
• Blueberry (TFA) 10ml
• ...

You have also a recipe of a liquid that contains these 2 flavours

1. Apple (TPA) 1ml
2. Blueberry (TFA) 2ml

When you Consume it, then it will decrease remaining amounts from these flavours in Flavours Collection page.

Favor Collection after consume.

• ...
• Apple (TPA) 10ml - 1ml = 9ml
• Blueberry (TFA) 10ml - 2ml = 8ml
• ...

Pro version gove you access to 14 pre-defined coil types and Custom type where you can build any kind of coils.

Sweet Spot Finder lets you find the sweet spot power on your coil build

Keep track of your remaning flavors amount by consuming them evey time you prepare new batch

Compare all batteris and find one that is best for you

You can find all e-liquids where your flavor is used and get notified whenever the remaning amount of used flavors is on the finish.

To keep your battery safe you should not exceed the Max Power Output. To do so, you should not use coils with lower resistance than battery's min. resistance

Easy to access home widget to fast calculate resistance, power, voltage and current

Besides all predefined wre materials you can add your own materials and use them to calculate your coils

Get inforamtion about the wires length needed to build your coil. This allows you to cut only required length.

Pro version is completely ad-free