Only if you want a faster auditing experience (hopefully that's a yes).
Our new app is designed to help you move much faster throughout the auditing process with the ability to swipe from question to question, quicker navigation on your question panel, and overall improvements to the audit engine.
As mentioned in this article, downloading the newest version of the app ("Simplifya") won't prevent you from having the old version ("Simplifya Auditor") on your tablet as well. But as we've been telling everyone, it's in your best interest to switch over to the tablet app sooner than later, as the old app will be phased out by the end of this year. "Phased out" means we'll no longer be offering support for that app, or creating new versions of it.
The new app on the other hand, we'll be adding brand new features on starting in early 2018.
Once you've downloaded the new version, you'll eventually want to delete "Simplifya Auditor". Before you do, read up on how to avoid losing your audit data.