The Microapp Blog
Guides, updates, and ideas from the team behind Microapp.
How to Predict Your Child's Adult Height
The most common way to estimate a child's adult height is the mid-parental method — average both parents' heights, then adjust for the child's sex. Here's how it works and how accurate it is.
How to Write Numbers in Words (With Examples)
To write a number in words, split it into groups of three digits, name each group, and add the scale word. Here's the method, the tricky bits, and how to fill out a check.
How to Make Small or Tiny Text (Copy and Paste)
Small text isn't a smaller font size — it's a set of special Unicode characters you can copy and paste anywhere. Here's how it works and how to make it.
How to Calculate a Tip (and Split the Bill)
A tip is a percentage of the bill. Here's how to work out 15, 18, or 20% in your head in seconds — and split it fairly across the table.
How to Calculate a Percentage: The 3 Formulas You Actually Need
Percentages come down to one idea: a part out of 100. Here are the three formulas that cover almost every real situation — with worked examples and a faster way to check your answer.
How to Calculate Percentage Increase and Decrease
Percentage change measures how much something went up or down against where it started. Here's the formula, worked examples, and the reversal trap that catches everyone.
How to Calculate a Discount (Percent Off)
A discount is a percentage taken off the original price. Here's how to find both the saving and the final price in your head — plus the fastest shortcut.
Percentage and Everyday Math Calculators: Tips, Discounts, and More
Most everyday math is percentages in disguise — tips, sales, tax, raises, grades. Here's the map of free tools for each, and the one formula they all share.
How to Calculate Speed, Distance, and Time
Speed, distance, and time are three versions of one formula. Know any two and you can find the third. Here's the method, the triangle trick, and worked examples.
Time and Date Calculators: Every Tool for Counting Days, Weeks, and Years
Whatever you need to work out with dates — your exact age, the weeks left in the year, the hours on a timesheet, the gap between two dates — there's a free tool for it. Here's the map.
How to Calculate the Age Difference Between Two People
The age gap between two people is the time between their birth dates — not just the difference in birth years. Here's how to work it out exactly, down to the day.
How to Calculate Your Exact Age (Years, Months, and Days)
Your exact age is the time from your birth date to today — full years, then the leftover months and days. Here's how to work it out, leap years and all.
How to Calculate the Hours Between Two Times
Finding the hours between two times trips people up because clocks run on base 60, not base 10. Here's the reliable way to do it — including overnight shifts and decimal hours for payroll.
How Many Weeks Are Left in the Year? (And How to Count Them Yourself)
A year holds about 52 weeks, so the number left depends on today's date. Here's the simple way to count the weeks remaining — plus a counter that shows the live number.
7 Best Review Request Tools for Travel & Hospitality (2025)
Discover the 7 best review request tools for travel and hospitality businesses to earn more 5-star reviews and boost bookings.
5 Best Time-Tracking Software for Law Firms in 2025
Looking for the best time-tracking software for law firms in 2025? See top tools for accurate billing, compliance, and productivity.
10 Best Order Tracking Software for E-commerce in 2025
See the best order tracking software for e-commerce in 2025. Improve shipping visibility, automate updates, and deliver a smoother experience.
7 Top Real Estate Listing Tools in 2025: AI to Virtual Tours
See the top real estate listing tools in 2025—from AI listing assistants to virtual tour creators. Upgrade your marketing and sell properties faster.