# Adding Machine 10Key Univ Lite — True 10Key Adding Machine

> Digital 10-key adding machine emulator with paper tape editing and export. (iPhone/iPad app by Richard Silverman.)

- Source: https://appshunter.io/ios/app/adding-machine-10key-univ-lite/id579393645 (this page in markdown: same URL + `.md`)
- Developer: [Richard Silverman](https://appshunter.io/developer/297096643)
- Category: Finance, Business
- Price: Free
- Rating: 4.30/5 from 192 App Store ratings · 49 written reviews indexed
- Age rating: +4
- Requires: iOS 12.4 · 23 MB
- Languages: German (Germany), European Spanish, French (France), American English, Italian
- Released: 2012-11-26
- Data updated: 2026-08-26
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/adding-machine-10key-univ-lite/id579393645/reviews.md

## What is Adding Machine 10Key Univ Lite?

'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)

## Key features

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

## What do users think of Adding Machine 10Key Univ Lite?

Overall sentiment: mixed

**Pros**

- 👍 Easy to use
- 👍 Works like a real adding machine
- 👍 Tape feature is useful
- 👍 Large, clear numbers
- 👍 Good for bookkeeping
- 👍 Free version is functional
- 👍 Visual print out for totals
- 👍 Big, easy-to-use keys
- 👍 Good for small businesses
- 👍 Can edit tape entries
- 👍 Free and functional

**Cons**

- 💸 Paid version is expensive
- 📉 Ads take up screen space on iPhone
- 🤏 Keys are too small on lite version
- 🗄️ Lite version has limited lines
- 💡 Trailing zeros not displayed
- 🤔 Clearing tape requires multiple clicks
- 📝 Tape is too short
- 😵 App crashes and loses data
- 📱 Does not support split screen
- 🚫 Begs for reviews constantly
- ⚠️ Basic features restricted in free version
- 💰 Upgrade is expensive

**Commonly reported bugs**

- 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

**Most requested features**

- 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
- Unlimited tape length
- Dark mode option
- One-button clear tape option

## Recent user reviews (10 of 49)

All indexed reviews: https://appshunter.io/ios/app/adding-machine-10key-univ-lite/id579393645/reviews.md

### 3/5 — OK

*2024-10-20, version 7.10kbu*

Lacks ability to set automatic cents. Lacks two sales tax rates or ability to deselect items from tax.

### 4/5 — Spend the $2.99 for the Paid Version

*2024-09-08*

The lite version only has 40 lines. If you need to add a cash drawer and reference your deposit, you’re going to need the extra lines. 

Also the ads take up a lot of the printing calculator keys and make it difficult to quickly enter amounts. If you’re using an iPad I don’t think the ads will bother you much. But, on an iPhone the ads take up valuable screen space. If you have a later iPhone keep in mind that that app does not include the screen space provided by the notch, and the keys don’t go all the way to the bottom. Keys are way too small on the lite version to do long inputs. 

The paid version does provide more screen space and up to 400 lines, so just pay the $3 to save yourself the effort.

### 5/5 — Very happy

*2024-08-29*

This app works the same way as an adding machine, which is what is used in bookkeeping and what I prefer. Thanks for taking the aggravation out of balancing my checkbook,(which I don’t think anyone but I do anymore.)

### 5/5 — Great app

*2023-12-01, version 6.20kbu*

Love this app.
Easy to use , many functions, and line writing..love it..

### 5/5 — calculator

*2023-11-06, version 6.20kbu*

Great,big numbers easy to learn and understand, I am very with this unit!
Thank You Jim Cosgrove
Lebanon, TN 37090

### 5/5 — Nice app

*2023-10-22*

Nice app does what it says not too annoying with ads. Only bad thing is you have to click 3x to clear tape

### 5/5 — Great App!

*2023-06-03*

This is my go-to iPhone calculator! I love the tape feature, and the ability to set the decimal. Highly recommended!

### 4/5 — Very useful p

*2023-05-17*

Behaves like a ‘real’ calculator. My only suggestion for change concerns the ‘tape record’ and history: the font used is very faint and difficult to read under anything less than ideal conditions.

### 5/5 — Very helpful

*2022-09-27*

This App has been perfect for me!   I do wish it would add a little more before I have to clear it.    I would definitely recommend this app.

### 5/5 — Way better than iPhone calculator

*2022-09-19*

I like that I can see all my entries throughout the calculation process.

## Frequently asked questions about Adding Machine 10Key Univ Lite

### What is a 10-key adding machine?

A 10-key adding machine is a type of calculator that uses a numeric keypad arranged like a telephone keypad, optimized for rapid data entry. It typically features reversed operator entry, meaning you enter the operator after the numbers, and allows for complex calculations like percentages.

### How does this app help with accuracy?

The iPad version includes 'TypeTone', an audio feedback system that guides your finger back to the center of a key, reducing errors. Additionally, the ability to edit and review paper tape entries allows for easy correction of mistakes.

### Can I save and share my calculations?

Yes, you can save your paper tape files for later use. These files can also be exported to iBooks, Dropbox, or your preferred printing utility, allowing you to share or print your calculation history.

### What is the difference between the Lite and full versions?

The Lite version is a functional version of the full app but has limitations on the number of paper tape lines and other features. The full version, 'Adding Machine 10Key Universal', offers more extensive paper tape history and additional capabilities.

### Is this app compatible with my device?

This universal version works with both iPhone and iPad. The iPad version offers a full-size keypad and additional features like TypeTone and multiple display orientations.

## Version history (last 5 releases)

### 7.10kbu — 2023-12-27

v7.10
====
1. Support for iOS 12.4 and newer.

### 6.20kbu — 2018-11-02

1. Errata was repaired that repeatedly asked user to 'review this App'.

### 6.14kbu — 2018-03-31

Updated for iOS 11.

Includes the following errata fixes:
1. Iphone version:
- screen resizes properly after a phone call
- app scales properly for large format phones

2. iPhone and iPad version:
- 'add-line' edit function was repaired
- total key sound is now different from CE key sound

### 6.12kbu — 2018-02-02

Updated for iOS 11.

Includes the following errata fixes:
1. Iphone version:
- screen resizes properly after a phone call
- app scales properly for large format phones

2. iPhone and iPad version:
- 'add-line' edit function was repaired

### 6.11kbu — 2018-01-30

Updated for iOS 11.

Includes the following errata fixes:
1. Iphone version:
- screen resizes properly after a phone call

2. iPhone and iPad version:
- 'add-line' edit function was repaired

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## More apps by Richard Silverman

- [Calc For Coders](https://appshunter.io/ios/app/calc-for-coders/id297096640)
- [Calc For Coders Lite](https://appshunter.io/ios/app/calc-for-coders-lite/id306579427)
- [Paper Calc Office](https://appshunter.io/ios/app/paper-calc-office/id328576488)
- [Paper Calc Office Lite](https://appshunter.io/ios/app/paper-calc-office-lite/id347713516)
- [Accountant Calculator](https://appshunter.io/ios/app/accountant-calculator/id374945395)
- [Adding Machine 10Key iPhone](https://appshunter.io/ios/app/adding-machine-10key-iphone/id392883834)

All apps by Richard Silverman: https://appshunter.io/developer/297096643

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*