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20 apps

Learning & Reference

20 apps

Learning & Reference: Citations & Research

1 app

Citation Generator

Create APA, MLA, Chicago, Harvard, and Vancouver citations from a DOI, ISBN, URL, or YouTube link, then export BibTeX or RIS.

Learning & Reference: Culture & Dates

4 apps

Chinese Lunar Date Converter

Turn a Gregorian date into its Chinese lunar date, zodiac year, and solar term.

Chinese Zodiac Finder

Find the Chinese zodiac animal and traditional year name for any birthday.

Prayer Times Calculator

Calculate daily Islamic prayer times from a date, location, and trusted calculation method.

Qibla Direction Finder

Find the compass direction toward the Kaaba from any latitude and longitude.

Learning & Reference: Sky & Science

4 apps

Equinox & Solstice Calculator

Find the exact equinox and solstice times that mark the four astronomical seasons.

Moon Phase Finder

See the Moon's phase, illumination, and the next four quarter phases for any date.

Next Eclipse Finder

Find the next solar and lunar eclipses after any date with their type and peak time.

Sunrise & Sunset Calculator

Calculate sunrise, sunset, and daylight length from a date and coordinates.

Learning & Reference: Countries & Travel

7 apps

Country Calling Code Finder

Find the international phone prefix for any country, or search a prefix to see possible countries.

Country Comparison Tool

Compare two countries side by side by area, region, currencies, languages, and borders.

Country Currency Finder

Find the currency name, code, and symbol used by any country.

Country Fact Finder

Look up a country's capital, region, codes, currencies, languages, area, and neighbours.

Country Language Finder

See the listed languages and native country names for any country.

Plus Code Decoder

Decode a full Plus Code into its center coordinates and covered area.

Plus Code Generator

Turn latitude and longitude into a shareable Plus Code that works without a street address.

Learning & Reference: Everyday Checks

4 apps

IBAN Checker & Formatter

Check an IBAN's country structure and checksum, then format it into readable groups.

International Phone Number Checker

Check whether an international phone number has a possible and valid shape, then format it clearly.

ISBN Checker & Converter

Validate ISBN-10 or ISBN-13, add correct hyphens, and convert between book-number formats.

Phone Number Country Finder

Find the likely country and calling code for an international phone number.