Advanced Calculator. HIgh vs Impossible Notes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Advanced Calculator. HIgh
This app combines a basic, scientific, and graphing calculator with a unit converter. It offers advanced mathematical functions, equation plotting, and seamless unit conversions for various needs. Access your calculation history across all modes.
- Basic, Scientific, and Graphing Calculators
- Advanced Mathematical Functions
- Real-time Function Plotting
- Smart Unit Converter (Length, Weight, Temp, Area, Volume)
- Calculation History
- Customizable Expressions
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Advanced Calculator revolutionizes mobile computing by integrating four essential calculation tools into one powerful application. Whether you're a student, professional, engineer, or need reliable everyday math—this app delivers everything you need. FOUR SPECIALIZED CALCULATORS, ONE SEAMLESS EXPERIENCE Basic Calculator - Everyday Math Made Simple Clean, intuitive interface for daily calculations. Large, easy-to-read buttons with smooth animations and instant results. Perfect for shopping, budgeting, tips, and quick arithmetic. Familiar layout means you start calculating immediately. Scientific Calculator - Advanced Mathematical Power Professional-grade computational capabilities at your fingertips. Execute trigonometric functions including sine, cosine, tangent, and hyperbolic counterparts (sinh, cosh, tanh). Access inverse trigonometric functions (sin⁻¹, cos⁻¹, tan⁻¹) with radian/degree mode switching. Perform logarithmic operations: natural log (ln), base-10 log, base-2 log. Calculate exponentials (e^x, 2^x, 10^x), roots (√, ∛), and powers (x², x³, x^y). Use mathematical constants π and e with precision. Factorial function handles combinatorial calculations. Absolute value and reciprocal operations add versatility. Revolutionary F(x) evaluator lets you input custom expressions and evaluate at specific x values—perfect for homework and problem-solving. Advanced Graphing Calculator - Visualize Mathematics Bring functions to life with our sophisticated graphing engine. Plot parabolas by adjusting coefficients in real-time. Switch to multi-function mode for graphing multiple equations simultaneously, each color-coded. Support complex expressions: polynomials (x², x³, x⁴), trigonometric functions (sin(x), cos(x), tan(x)), inverse trig, hyperbolic functions, logarithms, exponentials, roots, absolute values. Combine operations for sophisticated expressions like "sin(x²)" or "x*cos(x)". Interactive zoom controls explore functions in detail. Pan across the coordinate plane with customizable axis ranges. Intelligent rendering handles discontinuities and asymptotes automatically. Vertex highlighting identifies maximum and minimum points. Perfect for calculus, algebra, trigonometry courses. Smart Unit Converter - Instant Conversions Comprehensive converter handles everything automatically. Convert between metric and imperial across five categories: • Length: millimeters to miles (mm, cm, m, km, in, ft, yd, mi) • Weight: milligrams to tons (mg, g, kg, lb, oz, st, t) • Temperature: Celsius, Fahrenheit, Kelvin, Rankine • Area: square millimeters to acres (mm², cm², m², km², in², ft², acre) • Volume: milliliters to gallons (ml, L, m³, fl oz, cup, pt, qt, gal) Intuitive interface shows both units with instant bidirectional conversion. Quick swap reverses units with one tap. CALCULATION HISTORY - NEVER LOSE YOUR WORK Every calculation automatically preserved. Access complete timeline organized by calculator mode. Each entry shows expression, result, timestamp, and mode. Tap any calculation to recall its result. Swipe to delete entries or clear all history. Color-coded badges: blue (Basic), purple (Scientific), green (Graph), orange (Converter). PERFECT FOR EVERYONE • Students: Master homework from algebra through calculus • Engineers: Field calculations with confidence • Scientists: Complex computations accurately • Teachers: Demonstrate concepts visually • Finance Professionals: Quick calculations • DIY Enthusiasts: Convert measurements • Home Users: Everyday math effortlessly TECHNICAL EXCELLENCE Built with Swift and SwiftUI for optimal iOS performance. Precision floating-point arithmetic. Intelligent error handling. Sophisticated expression parser. Advanced rendering algorithms. Robust data persistence. Download Advanced Calculator today and experience the perfect fusion of power, elegance, and simplicity. From basic arithmetic to advanced graphing—we've got you covered!
Impossible Notes
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Notes that won't let you forget. Unfinished tasks resurface daily until you complete them. Finally, a notes app that holds you accountable. Impossible Notes is designed to eliminate silent forgetting. Every note starts unfinished. If you do not mark it done, it comes back. Every day. Unfinished notes automatically resurface at the top of your list and can trigger a single daily reminder. Finished notes move to your Done archive, keeping your active list focused. KEY FEATURES • Daily resurfacing of unfinished notes • One focused daily reminder • Mark done to stop resurfacing • Optional one-day snooze • Fast full-text search • Works fully offline • Local-first notes with no account required • Optional one-time Remove Ads purchase DESIGNED FOR FOCUS Impossible Notes is intentionally minimal. There are no folders, priorities, or tags. The app trusts time instead of structure. If something matters, it will keep coming back. PRIVACY AND ADS Your notes and note content stay on your device and are not uploaded by Impossible Notes. The free version may show third-party advertising on list screens. Advertising partners may process device and usage data subject to your consent and their policies. You can manage advertising privacy choices or permanently remove ads in Settings. See our Privacy Policy for details. If you are tired of losing important thoughts in endless lists, Impossible Notes makes forgetting impossible.
Screenshots
Verdict
The clearest difference is ads: Advanced Calculator. HIgh at none against Impossible Notes's shown. Impossible Notes's advantage is update cadence (every 2 weeks vs every 6 weeks) and iOS requirement (15.1 vs 26.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Advanced Calculator. HIgh ships an update every 6 weeks, Impossible Notes every 2 weeks. The most recent releases landed on June 8, 2026 and September 10, 2026 respectively.
| Parameter | Advanced Calculator. HIgh | Impossible Notes |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 3 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Martha G Korra | Storq Labs BV |
In-app purchases
Advanced Calculator. HIgh
No in-app purchases
Impossible Notes
No in-app purchases





