Comparison

Calctan vs Assinante ISP

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

Head to head
About

Calctan

This app offers a high-precision scientific and financial calculator with an editable tape for auditing calculations. It supports complex formulas, a wide range of mathematical functions, and customizable constants, all within an ad-free, private interface.

Highlights
  • Smart formula workspace with direct cursor editing
  • Advanced scientific engine with true order of operations
  • Auditable calculation history on a digital tape
  • Exportable reports via AirPrint and PDF
  • Multitasking support for iPad
  • iCloud synchronization across devices
  • Private and ad-free experience
Features
Read full description

Calctan is a high-precision scientific and financial tape calculator designed for iPhone and iPad. Built for students, engineers, accountants, and business professionals, Calctan bridges the gap between scientific computing and practical everyday finance. Edit complex formulas with ease, audit running totals on a printable tape, and enjoy a distraction-free workspace with no ads. KEY FEATURES 1. SMART FORMULA WORKSPACE • Direct Cursor Editing: Tap anywhere in your expression to fix numbers or operators instantly—no need to clear the expression and start over. • Live Syntax Validation: Real-time calculation preview with automatic balancing of parentheses as you type. • Fluid Multi-Line Display: Expressions scale dynamically so long formulas are never cut off. 2. ADVANCED SCIENTIFIC ENGINE • Complete Math Suite: Trigonometric functions (radians/degrees, inverse, hyperbolic), factorials, permutations, powers, roots, modulo, and logarithms. • True Order of Operations: Context-aware order of operations with high-precision calculations that minimize floating-point rounding errors. • Built-in & Custom Constants: A library covering mathematics, physics, and chemistry, plus customizable slots for your own tax rates or business ratios. 3. ACCOUNTING TAPE & REPORT EXPORT • Auditable Calculation History: Every calculation is automatically logged on a persistent digital paper tape. • Label & Categorize: Add custom notes, tags, and project labels to track expenses, homework problems, or client totals. • Batch Operations: Select multiple past entries to instantly calculate a running total. • AirPrint & PDF Reports: Generate itemized, professional calculation sheets to share, save, or print directly. 4. DESIGNED FOR PRODUCTIVITY • Multitasking on iPad: Full support for Split View, Slide Over, external keyboards, and trackpads. • iCloud Synchronization: Keep your saved formulas, constants, and calculation history unified across iPhone and iPad. • Customizable & High-Contrast Themes: Handcrafted color palettes designed to minimize eye strain during long study or work sessions. • Private & Ad-Free: No tracking, no data collection, and no subscription is required to calculate. We do not collect your data; calculations stay on your device and, if enabled, sync privately through your personal iCloud account. PERFECT FOR: • STEM & College Students: Algebra, calculus, physics, and exam prep with clear, step-by-step editing. • Finance & Accounting: Tax prep, budgeting, invoices, and expense verification with itemized tapes. • Retail & Small Business: Quick customer totals, discount percentages, and printable calculation logs.

About

Assinante ISP

Features
Read full description

Assinantes de internet agora tem ainda mais facilidade para receber suporte e acessar serviços essenciais como: - libera de confiança (desbloqueio) - segunda via de boletos - notificações sobre sua conexão e boletos - abertura de suporte - atualização de cadastro - histórico de pagamentos

Screenshots

Calctan4 screens
Assinante ISP4 screens

Verdict

The call

The clearest difference is in-app purchases: Assinante ISP at none against Calctan's 1. Assinante ISP also leads on iOS requirement (12.0 vs 16.6). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calctan sells 1 one-off in-app purchase. Assinante ISP asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Calctan versus Assinante ISP: the parameters behind the verdict, then further details
ParameterCalctanAssinante ISP
PriceFreeFree
Rating4.5 (61 ratings) — better—
Positive reviews28.6% of reviews—
Number of ratings61 — better—
Update frequencyEvery 3 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.612.0 — better
Further details — not scored
Size8 MB60 MB
Age rating4+4+
DeveloperJorge LozadaISPJet

In-app purchases

1 purchases

Calctan

One-time1
  • No Ads$0.99
None

Assinante ISP

No in-app purchases

Questions

Is Calctan free?
Calctan is free to download, with in-app purchases available.
Is Assinante ISP free?
Assinante ISP is free to download, with no in-app purchases.
Do Calctan or Assinante ISP have ads?
Neither Calctan nor Assinante ISP shows ads.

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