According to the latest information, the app is rated 4.5 on Google Play. Pay attention to the important detail: adverts are a part of Calculator Vault and it offers in-app purchases. This application is very popular among Samsung and Micromax users.
Download the .apk installation package of Calculator Vault 9.3 for free and take a look at users' reviews on Droid Informer. You will need 4 MB to set up the app that is designed for Android 4.0 and above.
From the users' point of view, the strong points of the app are a great design, advanced features, good performance, just a few bugs, auto updates and great support. Users write reviews pointing out that this application possesses such a disadvantage as annoying ads.