Yes, very safe!
All the Elevate Apps is coded using the highest standards and follow all requirements from Shopify. This will give you a smooth and error free experience.
Also, all the Elevate Apps is optimized for speed. This is not only good for SEO but user experience too.
And finally – if any parts of the app overwrite data in your shop (which they only do if you actively chose to) we will first backup the original data, so you can always revert to what you had.