iPhone Screenshots


Quickly calculate Limit Up Limit Down price bands.

In an effort to calm volatile markets, the stock exchanges implemented Limit Up Limit Down (LULD), a mechanism to prevent stocks from trading above or below calculated price boundaries, also known as price bands.

LuldCalc is a calculator for traders and stock exchange operators, and is handy for identifying these bands. It has buttons for tier 1 and tier 2 stocks, and calculates double-wide bands for market open and market close. It's a basic calculator too.

So put away your business calculator and memory functions. Set aside that pencil and paper. Don't bother loading a spreadsheet to calculate a stock's price bands. Use LuldCalc.

What’s New

Version 1.1

Changes are cosmetic: improved screen readability and contrast, and enhanced icons.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

App Privacy

The developer, Michael Yam, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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