Comparison

Function Calc vs SmartMark

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

Head to head
About

Function Calc

This app offers a powerful, programmable scientific calculator with graphing capabilities. It allows users to create custom functions, store equations, and perform complex calculations with ease. The interface features a visible tape display and supports dictation for statistical analysis.

Highlights
  • Programmable custom functions
  • Graphing capabilities
  • Tape display with edit/undo
  • Unit conversions (120+)
  • Dictate calculations
  • Export graphs (PDF, PNG)
Features
Read full description

A full-function, programmable, graphing scientific calculator designed to be very quick and easy to use, but with the added power of customisation. Tape display is visible while you type, and a swipe away from full screen view. Select and directly input any number from tape, undo or edit calculations. Easily create and use custom functions, store equations and useful numbers, use complex functions with multiple variables - fully programmable. Plot functions on a zoomable graph, export a high-resolution pdf copy. Dictate calculations and numbers for statistical analysis, with instant results. Completely free. • no adverts, no in-app purchases. • full set of scientific functions, unlimited nested brackets. • swipe to undo, step by step. • easily edit calculations and re-calculate. • optionally enter and edit calculations in standard maths format, rather than calculator order. • visible memory store. • tape output shows all calculations – swipe for full screen. • never type the same number twice – direct input from tape. • instantly convert between more than 120 different units. • zoomable text for easy reading and editing. • fully editable useful numbers page – store constants, conversion factors, commonly used numbers, tappable URLs or email addresses, or any text. • create, store and use functions for unit conversions or calculations, as simple as copy and paste. • dictate calculations, or lists of numbers for statistical analysis, get instant results. • create, edit and use complex functions with up to ten inputs or outputs – solve quadratic and cubic equations, calculate mortgage payments, compound interest, body mass index, triangles, the day of the week for any date, sunrise and sunset times and direction for any date and place, statistics (including normal, Student's T, Chi Square and F cumulative probability functions) and more – create or keep exactly what is useful, edit or delete what isn’t. 50 functions included. • fully zoomable graphing capability, plot one or two functions on a graph. Export PNG or high-resolution large pdf copies. • ideal for complex or repetitive tasks – custom functions reduce errors. • full help included.

About

SmartMark

This app uses AI to automatically organize your saved links by generating titles, descriptions, and tags. Easily search and share collections of resources across devices with a clean, intuitive interface. It offers both light and dark modes for a personalized experience.

Highlights
  • AI-generated titles, descriptions, and tags
  • Tag-based organization and search
  • Shareable link collections
  • Cross-browser and cross-device saving
  • Dark and light mode support
  • Secure data management
Features
Read full description

Paste a URL. AI organises the rest. Tired of messy bookmarks you can never find again? SmartMark uses AI to automatically generate titles, descriptions and tags for every link you save. No more manual sorting. --- AI-Powered Organisation --- Just paste a URL. SmartMark's AI assistant analyses the page and suggests a title, description and relevant tags. One tap to save a perfectly organised bookmark. --- Tag-Based Search --- Forget folders. Use tags like #Tech, #Design or #Travel to categorise your bookmarks. Search by tag to find any link in seconds, no matter how many you have saved. --- Share Your Collections --- Found a great set of resources? Share your bookmarked links with friends and teammates using a simple link. No sign-up required for recipients. --- Save From Any Browser --- Use Safari's Share menu to save pages directly to SmartMark, or save from your desktop with the SmartMark Chrome extension. Everything syncs instantly across all your devices. --- More Features --- - Dark and light mode - Works on iPhone and iPad - Clean, intuitive interface - Secure data management Free to use. Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Function Calc4 screens
SmartMark4 screens

Verdict

The call

The clearest difference is in-app purchases: Function Calc at none against SmartMark's 2. Function Calc also leads on ads (none vs shown) and ratings volume (3 vs 1). SmartMark's advantage is update cadence (every 9 days vs monthly). On price, rating, device support and iOS requirement 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. SmartMark sells 2 in-app purchases, starting at $2.99 per month. Function Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Function Calc against 5.0 for SmartMark. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UpkeepUpdate frequency

Function Calc ships an update monthly, SmartMark every 9 days. The most recent releases landed on October 7, 2026 and September 27, 2026 respectively.

Scorecard5 real differences · 5 level
Function Calc versus SmartMark: the parameters behind the verdict, then further details
ParameterFunction CalcSmartMark
PriceFreeFree
Rating5.0 (3 ratings)5.0 (1 ratings)
Positive reviews80.0% of reviews—
Number of ratings3 — better1
Update frequencyMonthlyEvery 9 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS18.618.0 — better
Further details — not scored
Size5 MB22 MB
Age rating4+4+
DeveloperHugh PelhamShuhei Fujimi

In-app purchases

None

Function Calc

No in-app purchases

2 purchases

SmartMark

Subscriptions2
  • Pro plan - Monthly$2.991 Month
  • Pro plan - Yearly$29.991 Year

Questions

Is Function Calc free?
Function Calc is free to download, with no in-app purchases.
Is SmartMark free?
SmartMark is free to download, with in-app purchases available.
Which has better reviews, Function Calc or SmartMark?
Function Calc and SmartMark are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.
Do Function Calc or SmartMark have ads?
SmartMark shows ads; Function Calc does not.
Which is updated more often, Function Calc or SmartMark?
Function Calc ships an update monthly, and SmartMark every 9 days. Most recently, Function Calc was updated on October 7, 2026 and SmartMark on September 27, 2026.

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