CalcTape for Android

CalcTape User Interface

The user interface of CalcTape for Android is simply constructed. The biggest part of the display is used by the keyboard. Above is the editor located where you can make your calculation. The navigation bar is integrated in the top area. From there you can go to the settings or copy your calculation.


Simple Calculation

Calculations in CalcTape can be created fast and easily. For that you enter a desired number, add a operator (like “+” or “*”) and type in another number. With an click on the “equal sign”, the entered numbers will be processed and a result will be calculated.

Several Calculations in one Document

CalcTape is so constructed that you do not need a new document for every new calculation. You can place several, disconnected calculations in one document. Therefore just click twice on the equal sign. Now you can begin with a new calculation in a new line.

Interim Results

By clicking the equal sign during the calculation, interim results will be created. They are shown on the right side directly above the keyboard. If you want to input the calculated values e.g. into other documents you only have to click on the copy sign next to the interim result. Now the interim result has been copied to clipboard.

Modify Calculations

CalcTape offers the possibility to modify and correct calculations in hindsight. For this you have to go to the line where you want to change something and delete the part which you don’t want anymore or enter a new value. The entire calculation will be automatically updated.

Furthermore CalcTape can also act as a text editor. Therefore you change the mode directly above the keyboard from calculator mode to text editor mode. Now you are able to edit calculations like in an normal text editor. This includes deleting or adding a new line, splitting and reunite calculations and simple copy & paste actions.

Percentage Calculation

In addition to the four elementary arithmetic operations CalcTape can also handle percentage calculations. Thereby you can make for example tax calculation in an easy way. You just add the respective percentage during the calculation, then click on the percentage sign and subsequently on “enter”. First CalcTape calculates the whole previous calculation on which result then refers the percentage calculation. The absolute value is shown next to the percentage as a comment.

Adding Notes and Comments

A further feature of CalcTape is the adding of notes and comments in calculations. This allows you to comment lines or take notes next to your calculation. Furthermore there is the option to enter text above or below calculations.

Saving a Document

The edited document will be automatically saved.


To navigate to the settings, just click on the menu button in the right top corner and select “Settings”. In the settings you can change the look of CalcTape by selecting a new theme or change the font size. Further you can decide which rounding behavior you want.

The presetting in CalcTape is to round the results. If you want to change the rounding behavior you can choose between “Round Nothing”, “Round Results” and “Round All”.


Numpad always on top

It can happen that some apps and launcher affect CalcTape in a way that the system keyboard overlays the numpad. This can be avoided when activating the option “Numpad always on top” in settings.

Numpad not showing

It can happen that the system keyboard overlays the numpad and you already activated the option “Numpad always on top” in the settings. There are some users who also use the App CleanMaster and it helped deactivating the “iSwipe” functionality in this App.

Pro version

The Pro version of CalcTape for Android offers many additional useful functionality.


The Scratchpad is a document which is opened at any time and which saves all your inputs automatically.

If you have an important calculation in your Scratchpad you can easily create a copy of it to safe it. Therefore you have to click the menu button in the right top corner and chose copy. Now the calculation of the scratchpad has been copied to clipboard and you can insert it in any document. You can also duplicate the Scratchpad. For that you have to click on the scratchpad in the document list and chose “duplicate”. The Scratchpad will now automatically be saved as an copy. You can find the copy of the scratchpad in the document list where you can rename it. How documents can be renamed is described here.

Create a new Document

Normally the Scratchpad is the first opened document. If you want to create a new one, switch to the document list, either over the arrow in the left top corner or over an swipe from the left display side to the middle. In the document list are all saved documents. To create a new document click on the plus icon in the right top corner.

Renaming, Duplicating and Deleting Documents

To rename or delete a document you have to do a long tap on a document in the document list. Now a new menu appears and you can select between the functions “open”, “delete”, “rename” and “duplicate”.

Sharing a Document

CalcTape offers to share calculations. This can be done as follows: Open the upper right menu and select “Share”. A window appears which contains different functions for sharing a calculation.

User Buttons and Functions

CalcTape for Android gives the possibility to create buttons with custom formulas or texts. This functionality allow to create new buttons and functions which are not integrated by default in CalcTape but which will help you to simplify your daily calculations. Therefore you tap and hold e.g. the “Button” button to enter the button screen. In the bottom bar you can choose between system buttons, user buttons and button size. Now you can see the already existing User Buttons (for example: “+TAX” or “-TAX”). In this window you can choose an already existing function, add a new user button or change already existing buttons.

Adding a new user button:

To create a new user button tap and hold on the “My Button” button until the button screen appears. Now click on “New” to create a new function. In the opened screen you type in label (button text), formula/text (content that will be entered into the calculation) and click “Save”.

Custom Keypads

Pro users are able to define their own keypads. In the calculation screen a user can choose between the keypads “K1” and “K2”. When changing the standard keypad by e.g. assigning a different function to a keypad position or changing the button size, CalcTape automatically creates a new custom keypad. All buttons in a keypad can be changed / newly assigned except numbers, decimal separator and backspace. All further changes to this keypad will also be saved. In the CalcTape settings the user can choose a different keypad for either K1 or K2. The user can also rename and deleted keypads here. The standard keypads include a normal keypad, left-handed keypad and a function keypad without numbers (completely customizable).

Buying CalcTape Pro

The Pro version of CalcTape for Android can be purchased from inside the App. Go to the menu and select “Buy CalcTape Pro”.