▸ Calculator + vs Lúa
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
▸ Calculator +
This app offers a comprehensive suite of 12 calculators, including scientific, currency, unit, and finance functions. It features advanced modes, extensive formula support, and a user-friendly interface for all calculation needs.
- 12 specialized calculators
- Over 800 formulas
- Scientific, RPN, and String modes
- Unit and currency conversion
- Finance and date/time calculations
- Equation solver and graphing
- History and expression export
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+ 800+ formulas in Formula Toolkit In-App + OVER 1 MILLION DOWNLOADS WORLDWIDE + Award Winning Calculator Since 2007 HiCalc Pro is an ultimate calculator and will make all your calculations become simpler than ever with 12 calculators: Basic, Scientific, Currency Converter, Unit Converter, Finance, Date - Time, Constants, Equation Solver, Statistics, Base conversion, Graph & Tip calculator. ► Noteworthy • Three calculating modes: STANDARD, STRING and RPN • Precision to 31 digits • BIG CALC in Portrait mode. • Comprehensive Date & Time calculator • Unit Converter contains 3,300 units in 113 categories • Currency converter with daily online update for 152 currencies • Extended Memory and Expression History supports • Intuitive interface • Export & send out expressions/history ► Features: • Multi-line LED with smart input for entering complicated expressions • Show expression as normal writing mode @ very useful for students • Advanced RPN mode with Stack viewer and functions: DROP, SWAP, ROLL, DEPTH, PICK, OVER, KEEP, LAST, CLEAR • Sending data from Ext-Memory & History list • Support 5 languages (English, French, German, Chinese & Vietnamese) ► Scientific calculator: • Basic fx: sin, cos, tan, sin-1, cos-1, tan-1, sinh, cosh, tanh, log, ln, sinh-1, cosh-1, tanh-1 … • Advanced fx: Random, nPr, nCr, Differential function, Evaluation function, Integration function, Root-Finder and Product function, Greatest Common Divisor, Least Common Multiple, Fibonacci function … • Complex numbers in STRING mode ► Unit Converter: a powerful and easy-to-use tool for converting over 3,300 units in 113 categories. • Special categories: Women and Girl's Clothing, Cooking, Electric Field, Density Traditional, Typography, UHF channel and frequency chart, Fuel Consumption … • Full text search for categories and units • Favorite & Recently used units • Update over the air ► Statistics calculator • 15 common functions: Σ(x), mean of X, AVD, SSD, SDV, C(n, k), Min, Max, GM... • 6 probability distribution functions: Binomial, Gamma, Gaussian, Geometric, Poisson, Rayleigh • Smart data input: data import from clipboard supported ► Graphing Calculator • Up to three graphs • Coordinate system movable • Zoom in/out ► Equation solver • Polynomial Equations (1st-4th) • N-simultaneous equations ► Base conversion • Full-featured base conversion ► Date & Time calculator • Date / Time difference: calculate duration between two dates. • Add/ Subtract: Add or subtract days, months and years of a given date to get a new date. • Events Countdown/up: Shows Time Remaining and Elapsed Time ► World Clock • Show date & time of any city in the World • Have 6 cool skins ► Finance calculator • Time Value of Money (NPER, RATE, PV, FV, PMT) • Mortgage & Loan Calculator • Finance functions: SLN, SYD, DB, NPV, IRR, NPER, RATE, PV, FV, PMT. ► Constants Library: • 1500 constants from Mathematics, Physics, Solar System and Element e.g: Avogadro number, Gravitational const, Stefan-Boltzmann Const, Speed of Light.
Lúa
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Lúa là ứng dụng giúp bạn quản lý chi phí sản xuất và bán lúa một cách đơn giản, rõ ràng và hiệu quả. Dành cho nông dân, thương lái và bất kỳ ai đang làm việc trong lĩnh vực nông nghiệp. Quản lý chi phí: Ghi lại chi phí phân bón, thuốc, giống, nhân công... Theo dõi chi tiết từng vụ mùa Tổng hợp chi phí nhanh chóng Quản lý bán lúa: Ghi nhận số lượng, giá bán Theo dõi doanh thu theo từng lần bán Tính toán lời/lỗ dễ dàng Thống kê & báo cáo: Xem tổng chi phí, doanh thu, lợi nhuận Phân tích theo thời gian hoặc vụ mùa Giúp bạn ra quyết định tốt hơn Đơn giản & dễ sử dụng: Giao diện thân thiện, phù hợp với mọi người Nhập liệu nhanh chóng Dữ liệu rõ ràng, dễ hiểu Lợi ích khi dùng Lúa: Kiểm soát chi tiêu hiệu quả Biết chính xác lời/lỗ mỗi vụ Không còn ghi chép thủ công Quản lý mọi thứ ngay trên điện thoại Phù hợp cho: Nông dân trồng lúa Người kinh doanh lúa gạo Hợp tác xã nông nghiệp
Screenshots
Verdict
The clearest difference is price: Lúa at Free against ▸ Calculator +'s $1.99. Lúa also leads on in-app purchases (none vs 4) and update cadence (every 3 days vs every 6 weeks). ▸ Calculator +'s advantage is iOS requirement (8.0 vs 15). On ads 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
Lúa is free to download; ▸ Calculator + costs $1.99 up front. ▸ Calculator + sells 4 one-off in-app purchases. Lúa asks for nothing beyond the download.
▸ Calculator + ships an update every 6 weeks, Lúa every 3 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.
| Parameter | ▸ Calculator + | Lúa |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.7 (904 ratings) — better | — |
| Positive reviews | 75.1% of reviews | — |
| Number of ratings | 904 — better | — |
| Update frequency | Every 6 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 15 |
| Further details — not scored | ||
| Size | 44 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | PPCLINK Software | Vo Hoang Tu |
Bugs and requests
▸ Calculator +
Reported bugs
5 issues- Date/Time screen cutoff at bottom and missing keyboard icon
- Currency exchange not working
- Periodic Taple option of HiCalcac pro is not compatible eith iOs 10
- Crashes in iOS 10
- Gig to meg conversion is incorrect
Requested features
5 requests- Dark mode option
- Advanced analytics dashboard
- Landscape mode support
- Equation solver for non-polynomials
- Auto-display of graph coordinates
Lúa
Not enough reviews yet to summarise bugs or requests.
In-app purchases
▸ Calculator +
- Formula Toolkit$0.99
- Periodic Table$0.99
- UI Upgrade$0.99
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- Biorhythm$0.99
Lúa
No in-app purchases









