Top 10 iPhone Calculator Apps in the U.S.: Choose by Task

Compare ten US iPhone calculator apps by documented features, payment model and work task, including scientific, notepad and construction tools.

The right iPhone calculator depends on your work. You might need a quick total, technical functions, a record you can revise, or measurements in feet and inches. Those are different jobs, so this top ten is an editorial shortlist by task. Its order does not represent download rank, market share, or results from hands-on testing.

Publisher disclosure: This guide is published by the team building Calculator Duo. Our upcoming app appears separately after the ten available products. We checked the developers' descriptions and US App Store listings on October 3, 2026; we did not install and test these apps.

How to choose from the shortlist

Start with one calculation you actually do at work. Decide which operations it needs, whether you revisit the inputs, and what another person must see when you share the result. Our guide to choosing a calculator for work on iPhone Duo turns those questions into a practical checklist.

All ten listings include iPhone support. That is documented compatibility, not our certification of behavior on a physical iPhone Duo. Prices below are US dollar observations, and a free download may have paid features. Check the current purchase screen and your iOS version before buying.

A quick comparison

Ten apps for different calculations

1. Apple Calculator: the built-in starting point

Apple's Calculator supports basic and scientific expressions, history, and Math Notes. Notes can use named variables and graphs, while the calculator also handles unit and currency conversions. It is worth checking this baseline before deciding you need another app.

Apple's overview explains the modes. Its US listing is free and includes iPhone; its package minimum is iOS 10, but newer features have their own OS requirements. For a sheet-focused alternative, compare Apple Calculator and Calculator Duo.

2. PCalc: technical functions and different number bases

PCalc, by TLA Systems Ltd., documents optional RPN entry, scientific and engineering notation, and hexadecimal, octal, and binary calculations. It also has a paper tape and undo/redo. A programmer checking number bases or someone using scientific operations has a concrete reason to look at this feature set.

The developer's iOS page describes the product. The US listing specifies iPhone with iOS 15 or later, a $9.99 purchase, and separate optional tips. PCalc Lite is not counted as another product here.

3. Calcbot 2: review an expression and return to history

Tapbots' Calcbot shows the expression you entered, saves calculations to a history tape, and lets you reuse earlier calculations. Unit conversion is also documented. That combination is relevant when your familiar calculator workflow needs a readable record.

Tapbots also describes emailing the tape. The US listing includes iPhone with iOS 15 or later: free download, with Calcbot Pro at $1.99. The listing marks history tape, conversion, and certain other features as requiring an in-app purchase. Do not assume every described function is free.

4. CalcTape: correct a line without rebuilding the calculation

CalcTape Paper Tape Calculator, from schoettler Software GmbH, keeps a calculation as an editable tape. Changing an earlier value updates later results; comments explain figures; saved calculations can be shared. This is relevant to a small estimate with several labeled costs.

The official iPhone and iPad page describes this workflow. Its US listing specifies iPhone with iOS 10 or later and $2.99. The listing explicitly says it is not a scientific calculator.

5. Calzy: keep numbers ready for reuse

Calzy, by Raja Vijayaraman under the WapleStuff brand, has a memory area for storing values, history, and titled calculation bookmarks. It also describes basic and advanced modes. Think of a task where the same few figures appear in different calculations and need recognizable names.

The official site introduces its memory approach. The current US listing includes iPhone and requires iOS 26 or later. It shows $1.99 plus optional tip purchases; those tips are not a subscription.

6. Tydlig: arrange connected calculations on a canvas

Tydlig Software AB's app uses a freeform canvas with linked numbers and results that update when inputs change. Its listing also describes attached text labels, graphing, and PDF export. This offers a different organization model for readers who want to see connected calculations spatially.

The US listing specifies iPhone with iOS 9 or later and $1.99. It links to the developer's website, for more information. The features described here are listed by its developer in the App Store. Its last listed version update is in 2017, so check compatibility with the version of iOS you use.

7. Soulver 4: work through numbers in written lines

Soulver combines a notepad with a calculator. The published features include natural-language expressions, answers beside lines, variables and references, plus sharing/export and iCloud sync. It fits the reader who wants words and calculations together while comparing a plan.

The official site describes the approach. The US listing, under seller Zac Cohan and Acqualia copyright, includes iPhone with iOS 17.6 or later. It is a free download with a trial and a one-time core purchase: Soulver 4 for iPhone is listed at $15. Optional data services have separate terms.

8. MyScript Calculator: write the calculation by hand

MyScript Calculator recognizes handwritten calculations, lets you add or scratch out elements, and supports dragging numbers for reuse. MyScript also describes history and exporting an image. This is an input-style choice for someone who prefers writing a sum to pressing a keypad.

See MyScript's product page and its US listing. The listing includes iPhone, costs $2.99, and requires iOS 13 or later. The description calls it Calculator 2. It is distinct from MyScript Math: Solve & Plot.

9. ClevCalc: choose a dedicated everyday calculation

ClevCalc - Calculator, by Cleveni Inc., offers arithmetic and scientific operations with history, converters, and dedicated discount and unit-price tools. It is a relevant option when you prefer selecting a tool for a specific everyday question.

The official product page and US listing describe the app. iPhone support requires iOS 15 or later. Downloading is free with advertising; optional ad-free premium is $2.99 monthly or $24.99 yearly.

10. Construction Master Pro Calc: specialized dimensional work

Calculated Industries' app documents feet-inch-fraction and metric calculations, right-angle/rafter tools, and area and volume functions. This is a specialized feature set for construction measurements, rather than a general arithmetic sheet claimed to cover every trade calculation.

The official product site provides context. The US listing includes iPhone with iOS 15 or later. The free download offers a stated 14-day trial and auto-renewing full access listed at $4.99 monthly or $39.99 yearly. Confirm the current offer and renewal terms when purchasing.

Where Calculator Duo fits

Calculator Duo is in development around labeled calculation sheets, editable rows, reused results, saved pages, and sharing static text or an image. It is separate from the ten publicly listed apps. Check the suggestions from its typed beta assistant before using a result.

A simple work example shows the intended task: 12 hours at $85 plus $240 in materials totals $1,260. Change to 14 hours and the total becomes $1,430. Keeping the assumptions visible helps explain that $170 change. If you need larger datasets or a shared model, consider when a spreadsheet fits better.

Choose the operations and organization that your work needs. Read the full developer description if your task needs a feature beyond this overview. Explore Calculator Duo and join the waitlist if its developing sheet workflow matches the calculations you want to revisit.

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