Comparison

Calctan vs Comment Blocker

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

Comment Blocker

Features
Read full description

Block toxic comment sections in Safari. This browser extension does not have access to your browsing activity, passwords, credit card details, or any other sensitive information. Privacy Policy • https://github.com/lucasditomase/comment-blocker Terms of Service • https://github.com/lucasditomase/comment-blocker Customer Support • https://github.com/lucasditomase/comment-blocker

Screenshots

Calctan4 screens
Comment Blocker1 screens

Verdict

The call

The clearest difference is update cadence: Comment Blocker at every 10 days against Calctan's every 3 months. Calctan's advantage is iOS requirement (16.6 vs 26.5). On price, ads, 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. Calctan sells 1 one-off in-app purchase and Comment Blocker sells 7 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Calctan ships an update every 3 months, Comment Blocker every 10 days. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Calctan versus Comment Blocker: the parameters behind the verdict, then further details
ParameterCalctanComment Blocker
PriceFreeFree
Rating4.5 (61 ratings) — better—
Positive reviews28.6% of reviews—
Number of ratings61 — better—
Update frequencyEvery 3 monthsEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS16.6 — better26.5
Further details — not scored
Size8 MB3 MB
Age rating4+4+
DeveloperJorge LozadaLucas Exequiel Di Tomase

In-app purchases

1 purchases

Calctan

One-time1
  • No Ads$0.99
7 purchases

Comment Blocker

Subscriptions7
  • Monthly$0.991 Month
  • Unlock app access3 Days trial$0.991 Month
  • 1 Month Subscription Plan$1.991 Month
Show 4 more
  • 6 Months Subscription Plan$4.996 Months
  • Custom Rules$4.991 Month
  • Annual$5.991 Year
  • 1 Year Subscription Plan$9.991 Year

Questions

Is Calctan free?
Calctan is free to download, with in-app purchases available.
Is Comment Blocker free?
Comment Blocker is free to download, with in-app purchases available.
Do Calctan or Comment Blocker have ads?
Neither Calctan nor Comment Blocker shows ads.
Which is updated more often, Calctan or Comment Blocker?
Calctan ships an update every 3 months, and Comment Blocker every 10 days. Most recently, Calctan was updated on November 2, 2026 and Comment Blocker on October 25, 2026.

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