Comparison

Inequality Calculator vs StudyDeck

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

Head to head
About

Inequality Calculator

This app solves linear and quadratic inequalities with detailed, step-by-step solutions. It supports fractions, parentheses, and presents answers in interval notation. Users can also access a history of up to 25 solved inequalities and email results.

Highlights
  • Solves linear and quadratic inequalities
  • Step-by-step solutions
  • Supports fractions and parentheses
  • Interval notation for solutions
  • Calculation history
  • Email results
Features
Read full description

A handy calculator with steps that solves linear and quadratic inequalities. Inequality Calculator can handle a wide range of linear and quadratic inequalities, including inequalities with fractions and parentheses. It's intuitive and easy to use. Just type in an inequality you want to solve and get the step-by-step solution. Features: Solves linear and quadratic inequalities. Solves one-step, two-step and multi-step inequalities. Supports fractions and parentheses. Shows step-by-step solution. Writes the solution as an interval (interval notation). Calculation history (25 inequalities) with the possibility to recall previous inequalities. Sends results via email. Note: The calculator does not solve inequalities with variables in the denominator.

About

StudyDeck

Transform notes, PDFs, or photos into AI-powered flashcards instantly. Offers seven study modes, including spaced repetition and practice tests, to help you learn smarter and ace exams. On-device AI ensures your study materials remain private.

Highlights
  • AI-powered flashcard generation
  • Import notes, PDFs, and photos
  • Seven distinct study modes
  • Spaced repetition (FSRS algorithm)
  • On-device AI for privacy
  • Progress tracking and analytics
  • Share decks with classmates
Features
Read full description

Turn any notes, PDFs, or photos into AI-powered flashcards in seconds. StudyDeck uses artificial intelligence to generate study cards automatically, so you spend less time creating and more time learning. SMART FLASHCARD CREATION - Paste text, import a PDF, or snap a photo - AI does the rest - Camera OCR scans handwritten or printed notes instantly - AI generates front/back cards, multiple choice questions, and true/false statements - Edit, customize, and organize cards into decks 7 STUDY MODES - Flashcards - classic swipe-to-study with flip animations - Multiple Choice - AI-generated answer options test real understanding - True/False - quick-fire statements to reinforce key facts - Written Response - type your answer and get AI-evaluated feedback - Audio Quiz - speak your answers and study hands-free on iPhone - Spaced Repetition - the FSRS algorithm schedules reviews at the optimal time - Practice Tests - timed mixed-format tests to simulate the real thing LEARN SMARTER WITH SPACED REPETITION StudyDeck uses FSRS v5, the most accurate spaced repetition algorithm available. It tracks what you know and what you don't, scheduling reviews right before you'd forget. No more wasting time on cards you've already mastered. AI THAT WORKS ON YOUR DEVICE StudyDeck uses Apple Intelligence for fast, private AI processing right on your iPhone. AI generation and speech recognition run on-device where supported, so your study materials stay private. BUILT FOR STUDENTS - Track your study progress with detailed analytics - See accuracy, mastered cards, and study streaks - Share decks with classmates - Dark mode and haptic feedback throughout - No ads FREE TO START Study with all 7 modes for free - up to 3 decks and 100 flashcards. Free accounts also include limited AI generation and import credits each month. Upgrade to Premium for unlimited access to everything. StudyDeck Premium: - Annual subscription with 7-day free trial - Lifetime access - one-time purchase - Unlimited decks and flashcards - Unlimited AI card generation - Unlimited PDF and photo imports - Unlimited practice tests and study guides - Free version: 3 decks, 100 flashcards, 5 AI generations, 5 PDF imports, 5 photo imports, 3 practice tests, and 3 study guides per month Privacy: StudyDeck processes everything on your device. On-device AI means your notes stay private. See our privacy policy for details. Privacy Policy: https://studydeck.net/privacy.html Terms of Use: https://studydeck.net/terms.html Questions? Visit our support page at https://studydeck.net/support.html

Screenshots

Inequality Calculator4 screens
StudyDeck4 screens

Verdict

The call

The clearest difference is review sentiment: StudyDeck at 100% against Inequality Calculator's 0%. StudyDeck also leads on price (Free vs $5.99) and update cadence (every 2 weeks vs every 15 months). Inequality Calculator's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 26.0). On ads and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

StudyDeck is free to download; Inequality Calculator costs $5.99 up front. StudyDeck sells 2 in-app purchases, starting at $12.99 per year. Inequality Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Inequality Calculator ships an update every 15 months, StudyDeck every 2 weeks. The most recent releases landed on September 28, 2026 and September 16, 2026 respectively.

Scorecard6 real differences ยท 2 level
Inequality Calculator versus StudyDeck: the parameters behind the verdict, then further details
ParameterInequality CalculatorStudyDeck
Price$5.99Free โ€” better
Positive reviews0.0% of reviews100.0% of reviews โ€” better
Update frequencyEvery 15 monthsEvery 2 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationPaidFreemium โ€” better
DevicesiPhone, iPad, iPod, Mac โ€” betteriPhone, iPad, Mac
Requires iOS12.0 โ€” better26.0
Further details โ€” not scored
Size13 MB13 MB
Age rating4+4+
DeveloperIntemodino Group s.r.o.Frederic Bacro

Customer experience

Inequality Calculator

Written reviews6 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

StudyDeck

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Inequality Calculator

No in-app purchases

2 purchases

StudyDeck

Subscriptions1
  • StudyDeck Premium Annual7 Days trial$12.991 Year
One-time1
  • Lifetime Pass$39.99

Questions

Is Inequality Calculator free?
Inequality Calculator costs $5.99, with no in-app purchases.
Is StudyDeck free?
StudyDeck is free to download, with in-app purchases available.
Do Inequality Calculator or StudyDeck have ads?
Neither Inequality Calculator nor StudyDeck shows ads.
Which is updated more often, Inequality Calculator or StudyDeck?
Inequality Calculator ships an update every 15 months, and StudyDeck every 2 weeks. Most recently, Inequality Calculator was updated on September 28, 2026 and StudyDeck on September 16, 2026.

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