How to install Flashcal+?

To install Flashcal+, visit the Google Play Store and search for the app, then tap the 'Install' button. The app will download and install automatically on your Android device.

Yes, Flashcal+ is safe to use. with 100+ downloads, indicating it has been verified and trusted by many users.

Does Flashcal+ have ads?

No, Flashcal+ does not display advertisements, providing an ad-free user experience.

What permissions does Flashcal+ require?

Flashcal+ requires various permissions to function properly. You can view the complete list of permissions in the 'App Permissions' section on this page or in the Google Play Store listing.

Flashcal+

Name: Flashcal+
Author: Holley Inc

Screenshots

Description

Been using Flashcal+ for a couple months now. It’s basically a speedo calibration app for Jeep Wranglers and Gladiators. Pretty solid if you’re into modding your off-road vehicle.

Here’s what you do: you can adjust your tire size and gear ratios, and it’ll recalibrate your speedometer so it reads accurately. And there’s also a TPMS on/off feature – took me a while to figure that one out but it’s useful. And you can see your true speed, not just what the dash is telling you.

Look, if you’re into tricking out your Jeep, you’ll probably like this app. It’s not perfect – the UI is a little clunky at times – but overall it does the job. Worth checking out if you want to make sure your speedo is dialed in, especially if you’ve lifted your rig or put on bigger tires.

Editor Opinion

So here's my take on Flashcal+. I've tested a bunch of car mod apps and this one's pretty solid. It's got all the core features you need to make sure your speedometer is accurate after changing wheels or gears. The UI isn't the slickest but it's functional. Beats having to take it to the shop every time. Overall, it's a handy tool if you're into Jeep mods, but it's not gonna blow you away. Definitely worth a download if you need the functionality.

Author Manya Lyalya Editor, Grand Screen

Pros & Cons

Pros

Tons of customization options for your Jeep's speedo
TPMS on/off is a nice extra feature
Free to use, no paywalls or in-app purchases
Works with both Wranglers and Gladiators

Cons

UI is a little basic and clunky at times
Didn't always sync properly with my vehicle
Gets the job done but nothing super fancy

Specifications

Updated	22.09.2025
Category	Auto And Vehicles
Age Rating	Everyone
Developer	Holley Inc
Android	Android 12++
Package Name	`com.holley.fcp`

Ratings

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User Reviews

Stormy Winters Oct 14, 2025

*UPDATED*: Finally was able to get into the app after trying on 3 different phones. Support wasn't much help. All they said was "it works fine on my phone." Finally...

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