Comparison

Thinkapp vs Inequality & System Solver

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Thinkapp

Features
Read full description

¡Únete a Thinkapp! Tienes a tu disposición diferentes modulos con vídeos del material psicoeducativo, para revisar cualquier duda que puedas tener, sesiones de mindfullness, así como la posibilidad de consultar dilemas con el grupo de usuarios de la app. ¡Anímate a incluirla en tu rutina! Esta aplicación ha sido diseñada como complemento a las intervenciones que se llevan a cabo para jóvenes que han tenido un primer episodio psicótico. Con esta aplicación podrás repasar el material psicoeducativo, utilizar sesiones de mindfullness planificar tu propia agenda y alarmas y consultar dilemas con personas que estén en tu red para recibir distintas opiniones y formas alternativas de solucionar las dificultades del día a día. Esta aplicación es supervisada por profesionales en salud mental.

About

Inequality & System Solver

This app provides step-by-step solutions for inequalities and systems of inequalities. It includes practice exercises, theory pages, and a dedicated math keyboard for easy input. Ideal for students and math enthusiasts seeking to understand and solve mathematical challenges.

Highlights
  • Step-by-step inequality solutions
  • Systems of inequalities solver
  • Practice exercises with solutions
  • Integrated theory pages
  • Dedicated math keyboard
Features
Read full description

Turn your device into the perfect math study companion. "Inequality & System Solver" is the ultimate app that guides you through solving inequalities, helping you understand the logic behind the numbers and always get the right results. Here's everything our app can do for you: ▶ STEP-BY-STEP SOLUTIONS Get the solution in an instant. But we don't stop at the final result: the app shows you all the logical steps in detail to solve polynomial, rational, radical, exponential, and absolute value inequalities, and many more. It's the perfect tool to understand your mistakes, learn the correct method, and get fully prepared for homework and exams. ▶ SYSTEMS OF INEQUALITIES Easily solve systems with multiple inequalities. The app supports step-by-step solving by clearly showing the sign analysis and the intersection of solutions, allowing you to study and apply the exact method taught in class. ▶ INTEGRATED MATH KEYBOARD Use our dedicated interface to easily type variables, fractions, exponents, roots, parentheses, greater than and less than symbols, and much more. And if you need to paste an inequality or prefer to use your device's standard keyboard, you can switch between modes in a snap. ▶ GUIDED EXERCISES FOR PRACTICE Test your skills with a rich library of ready-to-solve inequalities, sorted by difficulty and complete with detailed solutions, so you can strengthen your math foundation whenever you want. ▶ THEORY AND RULES ALWAYS AT HAND Having a memory lapse? Review fundamental principles, sign rules, and solving methods right in the app. Everything you need to know about inequality algebra is in one place. ▶ CLEAN INTERFACE AND DARK THEME No complications. The UI is simple, intuitive, and includes an elegant dark theme, specifically optimized to prevent eye strain during your evening study sessions. ▶ GUARANTEED RELIABILITY Our algorithms are tested and highly optimized to ensure accurate and instant calculations every time, even for the most complex systems and inequalities. ▶ CONSTANT UPDATES AND SUPPORT The app is regularly updated to always offer you the best performance and new features. Download "Inequality & System Solver" today and take your math skills to the next level!

Screenshots

Thinkapp4 screens
Inequality & System Solver4 screens

Verdict

The call

The clearest difference is ads: Thinkapp at none against Inequality & System Solver's shown. Thinkapp also leads on update cadence (every 10 days vs every 2 months) and iOS requirement (11.4 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Thinkapp ships an update every 10 days, Inequality & System Solver every 2 months. Both last shipped on October 5, 2026.

Scorecard3 real differences · 7 level
Thinkapp versus Inequality & System Solver: the parameters behind the verdict, then further details
ParameterThinkappInequality & System Solver
PriceFreeFree
Rating—4.2 (9 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—9 — better
Update frequencyEvery 10 days — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.4 — better15.0
Further details — not scored
Size15 MB47 MB
Age rating4+4+
DeveloperDESARROLLO4APP, S.L.Francesco Varotti

In-app purchases

None

Thinkapp

No in-app purchases

None

Inequality & System Solver

No in-app purchases

Questions

Is Thinkapp free?
Thinkapp is free to download, with no in-app purchases.
Is Inequality & System Solver free?
Inequality & System Solver is free to download, with no in-app purchases.
Do Thinkapp or Inequality & System Solver have ads?
Inequality & System Solver shows ads; Thinkapp does not.
Which is updated more often, Thinkapp or Inequality & System Solver?
Thinkapp ships an update every 10 days, and Inequality & System Solver every 2 months. Most recently, Thinkapp was updated on October 5, 2026 and Inequality & System Solver on October 5, 2026.

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