CalConvert vs Adding Machine 10Key Universal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalConvert
This app offers a powerful scientific calculator, extensive unit conversion capabilities across dozens of categories, and real-time foreign exchange rates for over 150 currencies. It also includes a world clock and convenient home screen widgets for quick access to its functions.
- Advanced scientific calculator
- Extensive unit conversions (600+ units)
- Real-time currency exchange rates (150+ currencies)
- World Clock functionality
- Home screen widgets for quick access
- Calculation history tape
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Download CalConvert: Pro Calculator, the Currency Metric Unit Converter. This is the #1 app in the App Store with an advanced scientific calculator, unit conversion functionality and currency foreign exchanges rates. Use CalConvert: Pro Calculator to solve complex math equations, figure out cooking volumes, and easily convert your cash with international foreign exchange currency rates. If you need one calculator to do everything, this is it! Versatile, comprehensive and easy to use: - Advanced calculator and scientific/mathematical functions in landscape mode - History tape: All calculations are saved and can be copied, used and shared - 27+ categories and over 600 units to convert, including metric to imperial and many more - Access 150+ currencies with their respective country flag without the internet - World Clock: View the local date & time in cities around the world Powerful tool & intuitive interface: - Shortcut Widget: Access any of CalConvert's main functions (Conversions, Calculator, Currencies) with one tap, from your home screen - Quick Convert Widget: Tap on any of your favorite unit conversions from your Quick Convert Widget on your home screen to go directly to that conversion page! - Equation preview: Current equation is displayed below the result - Easily save frequently used units of measurement and currencies - Searchable categories and units - Sort currency options alphabetically Available categories: Acceleration, Angle, Area, Astronomical, Cooking Volume, Data, Data Transfer, Density, Energy, Flow, Force, Frequency, Fuel, Length, Luminance, Power, Performance, Pressure, Radiation, Speed, Temperature, Time, Torque, Typography, Viscosity, Volume, Weight, Currencies, World Clock Available currencies: Bitcoin, Euro, US Dollar, Canadian Dollar, Chinese Yuan, British Pound, Japanese Yen, Australian Dollar, Afghan Afghani, Algerian Dinar, Argentine Peso, Albanian Lek, Angolan Kwanza, Armenian Dram, Aruban Florin, Azerbaijani Manat, Bahraini Dinar, Barbadian Dollar, Belize Dollar, Bhutanese Ngultrum, Botswanan Pula, Brunei Dollar, Burundian Franc, Bahamian Dollar and many more. Supports 24 languages: English, Deutsch, Dansk, Français, Nederlands, Magyar, Suomi, Português, Italiano, Español, Русский, Svenska, Slovenčina, Bokmål, Türkçe, Ελληνικ, Polski, Čeština, Română, Hrvatski, Українська, 日本語, 简体中文, 한국의 Thank you for using CalConvert: Pro Calculator, the Currency Metric Unit Converter! Have questions or feedback? Your suggestion could be our next feature! Email support: contact@maplemedia.io Website: http://www.maplemedia.io/
Adding Machine 10Key Universal
This app emulates a traditional 10-key adding machine for precise calculations. It offers features like reversed operator entry, percentage calculation, and the ability to review and edit entries on a digital paper tape. Users can save, export, and print their calculation tapes.
- 10-key adding machine emulation
- Reversed operator entry
- Percentage calculation
- Digital paper tape with editing
- Save and export tapes (PDF)
- TypeTone audio feedback (iPad)
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'Adding Machine 10Key Universal’ behaves like a true '10 Key' or 'adding machine' like those made by Monroe, Casio, Sharp and others. Press asterisk (*) for a total, operator entry is reversed, and calculate percentages by multiplying and adding to a stream of numbers. SEE THE 1ST FAQ BELOW. This universal version works with both iPhone and iPad. The iPad version features a full sized (1:1) keypad with TypeTone, a unique audio aid to help guide your finger back to the center of a key. The total (*) key (iPad or iPhone) can be on either the left or right side (Sharp or Canon style). Also. Review & edit numbers, add or delete lines. Save & retrieve paper tape files. Export paper tape files to iBooks©, Dropbox©, or your favorite printing utility (see the FAQs). ==== Recent Press ===== Has been featured in iTunes "What's Hot" in the Finance Category. Strategic Finance (Tools of the Trade): "If you're looking for a professional desk calculator that can give you full 10-key accounting functions with a tape you can name and save, edit, e-mail, or print, check out Interlocken's 10 Key for iPad." ================= Specifications: ================= . Behaves the same as a '10 Key' adding machine. . Export a PDF file to iBooks©, DropBox©, Email, and print with your favorite printing utility. . Use Apple AirPrint© to print directly. . TypeTone - a major innovation to aid accurate key entry using audio feedback (iPad version). . Full size (1:1) keyboard (iPad version). . Select from a menu of keypad sounds. . 400 lines of paper tape history. . 3 display formats: fixed, fix+, float . Save paper tapes to disk for later use. . Correct numbers, add comments, add/delete lines . Two keypads offer the 'total' key on the left or right (Sharp or Canon style) . Comprehensive set of help screens. . 3 Orientations: Landscape Left/Right + Portrait (iPad version) ================ FAQ's Q1. What is the difference between 'Adding Machine 10Key Univ', and 'Accountant Calc' in the App. Store.? A1. Both calculators are single-column adding machines or calculators with full-size (1:1) keypads and are optimized for the iPad User Interface. '10 Key' behaves the same as a 10 Key Adding Machine with reversed operator entry while ‘Accountant Calc’ supports free chaining of +, -, x, /, %, √, 1/x. It is easier to use if you are not familiar with how a '10-key' works. Q2. Can I touch-type? A2. The iPad version comes as close to touch-typing as a touch-screen can be. With ‘TypeTone’, a key will guide your finger back to the center of a key with an audio tone. Q3. How can I edit an incorrect number or add & delete lines from the paper tape? A3. Touch any line of the paper tape for edit mode. Touch the side controls: Add Line, Delete Line. You can also edit numbers, split Add/Sub or Mul/Div groups. Press Done to return to Calculator mode. Q4. Tell me about Email, Printing, and Exporting a Paper Tape. A4. Email includes a pdf attachment. Print requires an AirPrint capable printer. Open-In will cause a menu of 3rd party Apps to appear. Once exported, print directly to a network reachable printer (even if it is NOT AirPrint capable). ============================ TERMS AND CONDITIONS Your use of this application is governed by Interlocken Technology's Terms of Use (http://s354819480.onlinehome.us/InterlockenPrivacyPolicy/Interlocken%20Technology%20Privacy%20Policy.pdf) and Privacy Policy (http://s354819480.onlinehome.us/InterlockenPrivacyPolicy/InterlockenTechnologyTermsOfUse.pdf)
Screenshots
Verdict
The clearest difference is price: Adding Machine 10Key Universal at $3.99 against CalConvert's $24.99. Adding Machine 10Key Universal also leads on review sentiment (94% vs 76%) and chart position (#156 vs unranked). On rating, ratings volume, update cadence and ads 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
CalConvert costs $24.99 and Adding Machine 10Key Universal $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.6 for CalConvert against 4.7 for Adding Machine 10Key Universal. Both are backed by a comparable volume of ratings — 299 and 134 respectively. Written reviews are what separate them: 76% of CalConvert's written reviews are positive against 94% of Adding Machine 10Key Universal's.
CalConvert ships an update every 5 weeks, Adding Machine 10Key Universal every 2 months. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.
| Parameter | CalConvert | Adding Machine 10Key Universal |
|---|---|---|
| Price | $24.99 | $3.99 — better |
| Rating | 4.6 (299 ratings) | 4.7 (134 ratings) — better |
| Positive reviews | 75.8% of reviews | 94.0% of reviews — better |
| Number of ratings | 299 — better | 134 |
| Update frequency | Every 5 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #156 — better |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.4 — better |
| Further details — not scored | ||
| Size | 267 MB | 23 MB |
| Age rating | 17+ | 4+ |
| Developer | Maple Media Apps, LLC | Richard Silverman |
Customer experience
CalConvert
Adding Machine 10Key Universal
User reviews
CalConvert
From 299 App Store ratingsWhat we love
- 👍 Comprehensive and easy to use
- 🎨 Variety of skins/themes
- 💻 Works great on iPad
- ⚙️ Powerful scientific/conversion features
- 🔍 Clear and readable display
Room to improve
- 🐛 Bugs with screen layout and display issues
- 🔄 Slow startup/loading times
- 🔧 Lack of updates and maintenance
- 🔊 Audio focus issues with other apps
- 🔒 Lack of Retina support in paid version
Adding Machine 10Key Universal
From 134 App Store ratingsWhat we love
- 👍 Easy to use
- 🧮 Acts like an adding machine
- 🧾 Digital tape for review
- 🖨️ Can print tape
- 💾 Can save/export results
Room to improve
- 🐛 Outdated and no support
- 🐛 Doesn't work for new iPad
- 🐛 Total only shows non-zero decimals
- 🐛 Ridiculous method to clear tape
- 🐛 % key not functional
Bugs and requests
CalConvert
Reported bugs
3 issues- Screen layout issues in iPad portrait mode
- Inconsistent behavior when switching between portrait and landscape
- Paid version lacks Retina display support
Requested features
5 requests- Add widget support for quick calculations
- Implement fraction and tip calculator features
- Expand scientific functions for Apple Watch
- Improve memory management and performance
- Add customization options like dark mode
Adding Machine 10Key Universal
Reported bugs
11 issues- Cannot save taped
- Cannot export results
- Does not work for new iPad
- Total only shows digits after the decimal that aren't zero
- Method to clear the tape is ridiculous
Show 6 moreShow fewer
- It does not subtract
- No way to do handoff due to lack of iCloud syncing
- % key does not appear to do anything
- +/- key seems to be inoperative
- See index button doesn't do anything
- Review screen pops up every time the app is opened and 'don't ask again' doesn't work
Requested features
6 requests- Add widget
- Add realistic sounds
- Add iCloud sync
- Improve tape clearing method
- Clarify functionality of % and +/- keys
Show 1 moreShow fewer
- Improve instructions for less intuitive features
In-app purchases
CalConvert
No in-app purchases
Adding Machine 10Key Universal
No in-app purchases
Questions
Is CalConvert free?
Is Adding Machine 10Key Universal free?
Which has better reviews, CalConvert or Adding Machine 10Key Universal?
Do CalConvert or Adding Machine 10Key Universal have ads?
Which is updated more often, CalConvert or Adding Machine 10Key Universal?
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