Scientific calculator plus 991
★ 5.0Find an alternative to Scientific calculator plus 991
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First year: Unknown
Data and scoring
Profile based on reviews and description
- Profile analysed
- Jun 22, 2026
- App updated
- Oct 23, 2026
Store sources
- Google Play · Store data seen: Jul 27, 2026 · Data is over 30 days old — check the source
- RuStore · Store data seen: Oct 23, 2026 · Recently checked
Plans and limits
Plans and free-tier limits are not verified. Free installation does not mean free usage.
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Marketing versus reality estimates how well promised features are supported; stability estimates complaints about crashes and speed. Project activity is calculated from update recency, review activity and store availability. Percentages are not guarantees or success probabilities; missing data does not mean a zero score.
What it actually doesScientific calculator 300 es plus, 991 ex - a calculator for students and engineering students.
Actually does
- ✓Calculator95% of reviews
- ✓Справочник математических и физических формул15% of reviews
- ✓Несколько встроенных режимов калькулятора (базовый, расширенный, научный, графический)20% of reviews
- ✓Subscription12% of reviews
Claimed, but not confirmed by reviews
- ⚠Решатель уравнений (квадратные, кубические, системы)
- ⚠CAS (система компьютерной алгебры, символьные вычисления)
- ⚠Матричные и векторные вычисления
- ⚠Интегралы и производные (дифференциальное исчисление)
- ⚠Unit converter
- ⚠Dark mode
- ⚠Graph Plotting
Common complaints
- ✗Ads and paid version upsell12% of mentions
«I wanted to upgrade to the pro version to disable the annoying ads, but for some reason this feature doesn't work»
- ✗Complex interface, difficult to find needed buttons9% of mentions
«When I need a button, I can barely find it»
- ✗Lack of Russian-language user manual6% of mentions
«I would like to have a manual in Russian, it would significantly speed up learning the program»
- ✗Payment required for full functionality3% of mentions
«I don't like it. They want additional money.»
What people praise
- ★Many functions in one app, everything needed for scientific calculations
«All tools in one app, very convenient»
- ★Rich set of mathematical functions and advanced features
«A true Swiss Army knife»
- ★Convenience and intuitive usability
«Very convenient once you figure out how to use it»
- ★Built-in reference materials (formulas, cheat sheets)
«It has all the functions for scientific calculations and reference data»
- ★Unobtrusive ads (thin strip at the top)
«Ads in the form of a narrow strip at the top don't interfere and don't bother»