# Adding Machine 10Key iPhone — True 10Key Adding Machine

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

- Source: https://appshunter.io/ios/app/adding-machine-10key-iphone/id392883834 (this page in markdown: same URL + `.md`)
- Developer: [Richard Silverman](https://appshunter.io/developer/297096643)
- Category: Finance, Business
- Price: $2.99
- Rating: 4.60/5 from 130 App Store ratings · 60 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.4 · 10 MB
- Languages: American English, French (France), German (Germany), Italian, European Spanish
- Released: 2010-09-23
- Data updated: 2026-08-31
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/adding-machine-10key-iphone/id392883834/reviews.md

## What is Adding Machine 10Key iPhone?

'Adding Machine 10Key for iPhone’ 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.

The total (*) key can be on either the left or right side (Sharp or Canon style) and the keypad is expandable to show more or less paper tape history.

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, or your favorite printing utility.
. TypeTone - a major innovation to aid accurate key entry using audio feedback (iPad version only).
. Full size (1:1) keyboard (iPad version only).
. 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.

================

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. Only the iPad version includes ‘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)

## Key features

- True 10-key adding machine emulation
- Reversed operator entry
- Percentage calculation
- Editable paper tape history
- Save and retrieve paper tape files
- Export paper tape to iBooks, Dropbox, or printing utilities

## Chart rankings

- #26 in Top Paid · Finance (US App Store)

## What do users think of Adding Machine 10Key iPhone?

Overall sentiment: positive

**Pros**

- 👍 Works like a real adding machine
- 👍 Tape feature is excellent
- 👍 Easy to use and user-friendly
- 👍 Good for complex calculations
- 👍 Allows editing of numbers
- 👍 Saves work and can be emailed
- 👍 Handy for business and personal use
- 👍 Good replacement for physical adding machines
- 👍 Simple and fast
- 👍 Well-designed interface
- 👍 Good value for money

**Cons**

- 🐛 Watermarks premium exports
- 🐛 Haphazardly laid out controls
- 🐛 Touchy sound toggle in free version
- 🐛 Keypad glitch on re-opening
- 🐛 Nagging review requests
- 🐛 Incessant review requests
- 🐛 Clearing the tape is a guessing exercise
- 🐛 Custom keypad feature removed from iPhone version
- 🐛 Inconsistent sound and clear button behavior

**Commonly reported bugs**

- Watermarks premium PDF exports
- Haphazardly laid out controls
- Touchy sound toggle in free version
- Keypad glitch on re-opening
- Nagging review requests (Don't ask again button not working)
- Incessant review requests (Don't Ask Again option not working)
- Clearing the tape is a guessing exercise (I button behavior inconsistent)
- Custom keypad feature removed from iPhone version
- Inconsistent sound and clear button behavior

**Most requested features**

- Eliminate tape for bigger total screen
- Add square root feature
- Bring back custom keypad feature on iPhone version
- Allow more than 350 lines
- Allow more notations on tape
- Ability to custom label groups
- Fix period button centering
- Consider changing app icon
- Preferences for number format (input and output commas)
- More control over number formats

## Recent user reviews (10 of 60)

All indexed reviews: https://appshunter.io/ios/app/adding-machine-10key-iphone/id392883834/reviews.md

### 4/5 — Improvements needed before 5 stars

*2024-07-20, version 7.10k*

I bought the premium edition with ability to export PDF files. The program watermarks their own name at the bottom of the page which is selfish promotion on their part. I don't want their name on my work when I've paid for this application. The controls to edit export etc. are all there I just find them haphazardly laid out.

### 5/5 — Great adding machine

*2024-03-12*

I would like to see the feature where I could eliminate the tape and have a bigger “total” screen

### 4/5 — So useful

*2023-08-17, version 6.20k*

I love this app for complicated and long money columns. No more losing your place or accidental deleting like a calculator. There are a few buggish things that you can finally work around but I couldn’t have done my book keeping without it.

### 5/5 — Great Calculator

*2023-06-03*

The calculations are so easy to follow as you work through a list. The ability to produce and store the calculations makes it so much easier. Good app.

### 5/5 — Perfect!

*2022-08-08*

I have used adding machine apps on my iPhone for ten years and never liked any of them. This one is perfect!  It works like a ten key paper tape machine but it lets me edit a column of numbers to make corrections. Definitely get the upgrade to have 400 lines of numbers. To clear the register double tap the “i” key then  tap “clear”.  One last time: It’s perfect!

### 4/5 — Good in a grocery keeping a list

*2021-11-25*

I needed to keep track of my purchases for a discount of X dollars off in a grocery store. I found this app and  gave the free version a try.  It worked well  with minimal training until I hit the max lines in the free version, so I jotted down the total and started a new list.  My one complaint about the free version is turning off the click sound is touchy.  One has to be FAST to hit the off switch before the banner appears, but I got it on the 3rd try.  I figure @ $3 getting the update is worth the investment.  I have yet to really give it a real test to see what all it can do.  The only reason for not 5 stars is I do not know it well enough to give it maximum stars, but I doubt if anyone using it will be dissappinted.  The look and feel of the app is very well thought out.

### 4/5 — Nice needs a little tweaking though

*2021-03-24*

Nice app has a small glitch that prevents you from adjusting the keypad down too the lowest setting though. When you close it out and try Re-opening it again it shows a gap between the minus and plus key.

### 5/5 — Does what it claims.  A pleasure to use.

*2020-08-28, version 6.20k*

Does what it claims.  A pleasure to use.

### 5/5 — Great app

*2020-04-15*

Has all I need @ the end of the day 
Get my totals the email them to everyone that needs them. Have one on each of my devices and the files have saved me more than once. Love this app.

### 5/5 — Great App

*2020-01-16*

This is a great ten key logic app.  Does just what I want, and the tape is a great advantage over other calculators.   I do wish they would add a square root feature, but I understand that is not usually on a ten key adding machine.

## Frequently asked questions about Adding Machine 10Key iPhone

### 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 entry of numbers. This app emulates that experience, including reversed operator entry, which is common on such devices.

### How can I edit or export the paper tape?

You can edit incorrect numbers or add/delete lines by touching a line on the paper tape to enter edit mode. To export, use the 'Open-In' feature which allows you to send the paper tape as a PDF to services like iBooks, Dropbox, or via email, and can also facilitate printing.

### Is this app free to use?

Yes, the application is available for free. There are no in-app purchases or advertisements mentioned in the provided description, indicating a completely free user experience.

### What devices is this app compatible with?

The application is specifically designed for the iPhone. While some features like 'TypeTone' and a full-size keyboard are noted as being part of the iPad version, this listing focuses on the iPhone functionality.

### What are the main use cases for this app?

This app is ideal for users who require the precise and efficient input of a traditional 10-key adding machine for tasks such as accounting, financial calculations, or any situation where rapid and accurate numerical entry is crucial.

## Version history (last 5 releases)

### 7.10k — 2023-12-27

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

### 6.20k — 2018-11-07

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

### 6.14k — 2018-03-22

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
- 'add-line' edit function was repaired
- total key sound is now different from CE key sound

### 5.6k — 2016-03-03

1. Updated App Store screenshots.

### 5.4k — 2016-02-17

1. Repaired voice dictation for comments in iOS 8 & 9
2. Quickly clear the paper-tape history with a double-tap of the calculator's round 'i' (Info) icon.

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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)

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 2026-08-31.*