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Use the app to study the 100 questions and answers for US Citizenship Test, and take practice test.

How to use

The app has two modes to choose: 

1. "Question and Answers" is the mode for simply going through all the questions, with answers provided, for getting familiar and memorizing the answers for all questions.

2. "Practice Test" is the mode for taking simulated test, with 10 questions randomly selected from the 100 questions, to help get used to the testing procedure similar to the final oral test with USCIS officers.



This QR code app is your one stop solution. 

Scanner: Use the camera of your mobile device to scan a QR code, the result will show up, click it and it will take you to the link.

Reader: Go to your photo library and choose the photo with a QR code, and the app will read it and show the result. Click it and it will take you to the link.

Generator: Type in the information for which you'd like to generate the QR code, and the app will create the high resolution QR code image. You can choose to save the image to your photo library if you'd like.



Setting up daily reminders with notifications has never been so easy.

This app is for scheduling daily reminders with notifications.

For any reminder, user can set the title, notes, remind time, repeated daily or not. User can set, delete, or edit any reminder as needed. User can also set the preferred sound for notification. All functions are easy to use.

"+" add button - enter the page to create a new reminder.

"Delete" - right swipe a reminder in list can allow user to delete the swiped reminder.

"Edit" - right swipe a reminder in list can allow user to edit the swiped reminder, by entering the page to adjust the reminder setting.

"Enable/Disable" button (Green/Black box) at left of each reminder in list allows user to enable or disable a reminder. If disabled, then notification of the reminder will not be received.

"Delete ALL" - delete all reminders.

"Sort List" - choose different ways to sort the reminder list, including by "Title", "Time", "Enabled", "Daily Repeat", etc.

"Bell" - click to swith UI button sounds on or off.

"Email" - send all reminders to any email address.

"Sound" can be clicked on top right corner in Add/Edit reminder page, to allow user to set the notification sound.

All functions should be intuitive and straightforward.

Please share any question or comment, on app review in app store.



Handy Tip Calculator makes it easy to figure out the right amount of tip, by adjusting the tip percentage, before or after tax, and how many people to split the bill.



All-In-One App for conversion between speech and text. You can either get the text converted in real time from speech, or let your phone speak the text for you.

How to use

This All-In-One App has two modes, "Speech to Text" or "Text to Speech. It's a great tool for business, productivity, or entertainment.

With the mode of "Speech to Text",  you can easily convert a speech in real time into text, and you can then email the text if you'd like. 

With the mode of "Text to Speech", you can type in or paste the text, and the cell can read it out for you.

You can select different language, from English, Chinese, Spanish, and Hindi. Other languages will be available in the next version.

You can change the Voice Gender (male or female) for the "Text to Speech" mode, and the speech speed can be adjusted, slow or fast, as you'd like.



Keep the shark alive

Hungry shark! You need to help the hungry shark hunt fish, shrimp, crab, and avoid whale. Shark has 5 lives. Keep the shark alive and get the highest points.

This game is to keep the hungry shark alive by hunting small fish/shrimp/crab but avoiding shark-eating-whale. Get 1 point by eating one fish/shrimp/crab. Shark dies after being eaten by whale. But the shark has 5 lives. Try to help the shark get the highest points. Tap the screen to give the shark a lift.

The Ocean by Savfk |

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Smarter! Happier! Healthier!

This app makes math fun! Both kids and adults like to play the game.

With this math app, you can try to get a target number, by using each of the 4 random numbers once, with any of the operations, i.e. addition, subtraction, multiplication, or division. 

You can set your own target number, which is 24 by default.

You can choose "Practice" mode to get proficient with the game, or choose "Test" mode to examine your skills. You can set the time for your "Test" as long as you want, from 1 to 10 minutes. 

This game can help you improve your math skill, reduce your daily pressure, make your brain relax, make you smarter, happier, and healthier!




Fall in love with Math from today! A fun app for kid to build math skills.

A fun app for kids in Kindergarten, 1st, or 2nd grade, to practice and test basic math skills. The level can be changed, with relaxing music and flower award. Fun!



Handy Ruler makes it easy to measure any distance or length with your smart device. Get the result in no time by simply picking the start and end points on screen. 


Handy Ruler is a measurement tool that is easy to use, for measuring any distance of two points. 

The result is given in no time once the start and end points are picked on screen.

The measurement procedure is simple:

First, point the camera to the object to be measured. 

Once the camera stabilizes, many small yellow dots will be shown. 

Then pick the start point by touching the screen. A green point is shown to represent the start point. 

Then pick the end point by touching the screen. Also, another green point is shown to represent the end point. 

Then the measurement result is shown on the top of screen, in both Inch and mm.

Leave your feedback here, and we will keep improving the app!

Have fun!



Use this free and easy to use app to conveniently measure any angle. Select three points, with audio assistance, and the angle is automatically calculated.



Use this free and easy to use app to conveniently measure any area. Select 3 or more points, with audio assistance, and the angle is automatically calculated.



Handy Level ! It's convenient and easy to use to check and make sure any surface is perfectly horizontal. Green indicates the surface is horizontal.

How To Use

Handy Level is a tool you can easily use to check if any surface or object is horizontal. Put your device onto the surface or object you want to measure. If the table's color changes to Green color, it indicates the surface or object is perfectly horizontal. Otherwise, the table color is Grey.



Handy Barcode Scanner makes it so convenient to get the information of a product by scanning the barcode on the package.

How to use

This app is for you to get the information of any product by scanning the barcode. First place your phone's camera to scan the barcode of a product's package. The app will first take the image of the barcode and automatically generate the code then show it below the camera view, without typing the code manually. Then the app will call UPC code database to search the code, and find the information of the products. After the product information is obtained, it will be displayed below the UPC code.



Handy app to help user know the direction with a compass. It allows user to choose to show the map with the current location of the user at the center, while showing the compass.



This handy app can help you know about your health quickly by calculating your BMI body math index.

The BMI is defined as the body mass divided by the square of the body height, and is expressed in units of kg/m2, resulting from mass in kilograms and height in meters.

Major adult BMI classifications are underweight (under 18.5 kg/m2), normal weight (18.5 to 24.9), overweight (25 to 29.9), and obese (30 or more).



This handy app helps user conveniently calculate mortgage monthly payment, total payment, and total interest, based on the total loan amount, loan term, and interest rate.



Use the app to see how your money can grow over time thanks to interest compounding, monthly, quarterly, or annually, and generate a chart or table to review the growth.


You can use the app to forecast how much interest you might earn on your savings, investment, or 401(k) over a period of years and months. Here's how to do it:

1. Enter the initial principal;

2. Enter the interest rate (annual);

3. Enter the term (number of years);

4. Select the compounding type (monthly, quarterly, annually);

5. Enter any additional periodic deposit (the same frequency as compounding);

6. Choose the beginning or end of the period for the deposit;


Disclaimer: Whilst every effort has been made in developing the app, please always seek a professional opinion before making an investment. We are not to be held liable for any damages or monetary losses arising out of or in connection with their use.



Use this free and easy-to-use app to analyze and maximize the return on any investments, including stocks, bonds, real estate, bank savings/CD/money market, etc.


This app allows you to quickly analyze investment returns and make the best choice to maximize the ROI.

Input the initial investment, rate of return, and the number of periods, the app quickly calculates the details, including the total investment value and the return. The chart and table show the details of your investment each year.

Disclaimer: The calculation of this free app is for reference purposes. Please always seek a professional opinion before making an investment.




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