Ultimate Tools Blog

How to check phone number correctness: international formats, country codes, mobile and landline numbers.

6 min read - 2026-02-06

How to properly sort lists, take into account encoding and work with different formats.

4 min read - 2026-02-06

A Guide to Digital Data Units. Difference between megabytes and mebibytes, calculation of storage capacity.

7 min read - 2026-02-06

How to use heart rate zones for effective training. Tips for runners, cyclists and fitness.

6 min read - 2026-02-06

How to measure typing speed, what WPM and CPM are, what speed is considered good, and how to improve the skill.

7 min read - 2026-02-06

Examples: discounts, taxes, loans, stats, and other everyday percentage problems.

5 min read - 2026-02-05

How to use the online timer and stopwatch. Countdown, laps, and sound alerts.

5 min read - 2026-02-05

Practical regex tips: optimization, readability, common mistakes and best practices.

5 min read - 2026-02-05

A detailed guide to using the virtual coin for decision-making, draws, and settling disputes.

5 min read - 2026-02-05

Practical money management tips: how to cut expenses, increase savings, and avoid common mistakes.

5 min read - 2026-02-05

Practical advice on image compression: choosing a format, setting quality, automation.

5 min read - 2026-02-05

How to correctly identify the type of combinatorics problem and choose the right formula.

5 min read - 2026-02-05