Comparison

Adding Machine 10Key Univ Lite vs Calculator++F

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

Head to head
About

Adding Machine 10Key Univ Lite

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 edit and save paper tape files. The iPad version includes a full-size keypad with audio feedback for enhanced accuracy.

Highlights
  • 10-key adding machine emulation
  • Reversed operator entry
  • Percentage calculation
  • Paper tape editing and saving
  • Export paper tape files
  • TypeTone audio feedback (iPad)
Read full description

'Adding Machine 10Key Univ Lite' 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). 'Lite' Version Description ================== This is the full version of Adding Machine 10Key Univ, but with a reduced number of paper tape lines & other limitations. You can find the full version by searching for 'Adding Machine 10Key Universal' by Richard Silverman in the App Store. ==== 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, or your favorite printing utility. . 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 (full version). . 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). ============================ INCLUDED IN THIS LITE VERSION: . 16 lines of paper tape history . Limited to 2 keypad sounds . Only save 2 paper histories to disk . Ads for Interlocken products at bottom of display UPGRADE TO THE FULL VERSION IN THE APP STORE 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)

About

Calculator++F

This app allows for complex calculations using expressions, with one-touch discount and tax calculations. It automatically saves your calculation history for easy review and reuse, making everyday financial tasks efficient.

Highlights
  • Expression-based calculations
  • One-touch discount and tax calculation
  • Automatic calculation history
  • Reuse historical expressions
  • Memory function
  • Mini-game for mental exercise
Read full description

It is a calculator application which can calculate collectively by expressions like 100+30-50. Discount / premium calculation can be done with one touch. Calculation history is automatically recorded and can be confirmed at any time. You can use it in various scenes of everyday such as shopping, tax calculation, estimate. We emphasize easy-to-use and easy-to-view and it is simple. By using the calculation history, it is released from the trouble of doing the same calculation and taking notes many times. Also, you can reuse historical expressions and answers for calculation, so you can calculate efficiently. On the history screen you can calculate the total of the answers. Expressions are saved every time you enter them, so you can resume calculation immediately after you suspend or end the application. The answers are displayed while you are entering the formula, so you can easily recalculate. Discount calculation such as 20% and 30% discount can be done with one touch. As buttons preset in units of 5%, such as 5%, 10%, 15% are prepared, you can easily calculate. If you use the input box you can also calculate in 1% unit. Moreover, it can calculate with VAT inclusion / VAT exclusion with one touch. Multiple tax rates can be set. If there are multiple tax rates, you can select the tax rate smoothly by touching the calculation button of the tax and then sliding it. A memory key is installed. This allows you to store a totalizer at each break of a calculation and calculate the total value. It can be used conveniently for purchases, for example. 【Usage】 Press the "M +" key to add a sub-meter to the memory Press the "M -" key to subtract the subtotal from the memory Press the "M C" key to delete the last value stored in the memory (memory clear) Press the "M AC" key to delete all the values stored in the memory (memory all clear) If it is not use, you can turn it off from the setting. A mini-game of calculation is carried and you can do a gymnastication of head in idle time etc. [Function introduction] · You can enter expressions and calculate them all together · As with ordinary mathematical expressions, x and ÷ are calculated preferentially · You can calculate using () (You need to make settings on the setting screen in order to display keys) · As the expression becomes longer, the characters become smaller, so you can enter many numbers · You can select the format of the decimal point and punctuation mark 12,345,678.9 (English-speaking countries, Japan, China, etc.) 12.345.678,9 (Germany, Italy, Spain, etc.) 12 345 678,9 (France, Russia, etc.) 1,23,45,678.9 (India etc.) · Even if the application is interrupted or terminated during calculation, the formula at that time is saved, so you can resume calculation immediately · By using the check box on the history screen, you can calculate the total value of answers · Touch the history expression or answer, you can calculate by reusing those values · "00" key is attached · You can correct one character by backspace key · VAT and discount · premium calculation can be done with one touch · You can choose your favorite one from several designs · You can set the key to right-justified or left-justified so that it can be operated with one hand even on a large screen · You can select the number of decimal places to display · It corresponds to the consumption tax reduction tax rate · You can display it sideways on iPad · You can exercise your head with a calculation game This application will display advertisements. (The banner appears at the top of the screen)

Screenshots

Adding Machine 10Key Univ Lite4 screens
Calculator++F4 screens

Verdict

The call

The clearest difference is ads: Adding Machine 10Key Univ Lite at none against Calculator++F's shown. Adding Machine 10Key Univ Lite also leads on monetization model (free vs ad-supported) and ratings volume (192 vs 22). On price, rating, update cadence and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for Adding Machine 10Key Univ Lite against 4.5 for Calculator++F. That said, the two scores are not equally well evidenced: Adding Machine 10Key Univ Lite has 192 ratings behind it against 22, so its average is the more settled of the two. Written reviews are what separate them: 80% of Adding Machine 10Key Univ Lite's written reviews are positive against 71% of Calculator++F's.

UpkeepUpdate frequency

Adding Machine 10Key Univ Lite ships an update every 6 weeks, Calculator++F every 2 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Adding Machine 10Key Univ Lite versus Calculator++F: the parameters behind the verdict, then further details
ParameterAdding Machine 10Key Univ LiteCalculator++F
PriceFreeFree
Rating4.3 (192 ratings)4.5 (22 ratings) — better
Positive reviews79.6% of reviews — better71.2% of reviews
Number of ratings192 — better22
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.4 — better13.0
Further details — not scored
Size23 MB71 MB
Age rating4+4+
DeveloperRichard SilvermanYUTAKA KENJO

Customer experience

Adding Machine 10Key Univ Lite

All ratings192 ratings
Positive86.5%
Neutral6.3%
Negative7.3%
Written reviews49 reviews
Positive79.6%
Neutral8.2%
Negative12.2%

Calculator++F

All ratings22 ratings
Positive86.4%
Neutral9.1%
Negative4.5%
Written reviews66 reviews
Positive71.2%
Neutral7.6%
Negative21.2%

Bugs and requests

Adding Machine 10Key Univ Lite

Reported bugs

4 issues
  • 3 digits get frozen during calculations
  • Crashed and lost data
  • The "don't ask again" button for reviews does nothing
  • App freezes when switching apps

Requested features

8 requests
  • Ability to set automatic cents
  • Two sales tax rates or ability to deselect items from tax
  • More lines in the free version
  • More screen space on iPhone
  • Ability to add more before clearing
Show 3 more
  • Unlimited tape length
  • Dark mode option
  • One-button clear tape option

Calculator++F

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Adding Machine 10Key Univ Lite

No in-app purchases

None

Calculator++F

No in-app purchases

Questions

Is Adding Machine 10Key Univ Lite free?
Adding Machine 10Key Univ Lite is free to download, with no in-app purchases.
Is Calculator++F free?
Calculator++F is free to download, with no in-app purchases.
Which has better reviews, Adding Machine 10Key Univ Lite or Calculator++F?
Calculator++F is rated higher. Adding Machine 10Key Univ Lite averages 4.3 out of 5 from 192 ratings, while Calculator++F averages 4.5 from 22 ratings.
Do Adding Machine 10Key Univ Lite or Calculator++F have ads?
Calculator++F shows ads; Adding Machine 10Key Univ Lite does not.
Which is updated more often, Adding Machine 10Key Univ Lite or Calculator++F?
Adding Machine 10Key Univ Lite ships an update every 6 weeks, and Calculator++F every 2 months. Most recently, Adding Machine 10Key Univ Lite was updated on October 22, 2026 and Calculator++F on October 24, 2026.

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