Scientific calculator plus 991

Scientific calculator plus 991 is an education app for Android from Tools for student.

Scientific calculator plus 991 carries a 4.8 star average across 557,376 ratings, with over 50 million installs recorded on Google Play. That places it among the better reviewed titles in its category.

How it compares

Its 4.83 rating sits above the 4.46 median for the 200 education apps we index, placing it in the top 4% of the category by score. By install count it ranks 14 of 200 in this category.

Track record

Scientific calculator plus 991 has been on Google Play for roughly 6 years.

What changed in 7.4.7.69

The developer's notes for this release cover bug fixes and new content.

Update history

The last update was Feb 9, 2026, roughly 7 months ago. Check compatibility with recent Android releases before installing.

Requirements

• Version: 7.4.7.69
• Requires: Android 7.0+
• Download size: Varies with device
• Content rating: Everyone

Cost

The download is free. Inside the app, Scientific calculator plus 991 offers in-app purchases and displays advertising.