Measurement tools
Check size, angle, direction, level, sound, and time.
- Screen ruler
- Protractor
- Bubble level
- Compass
- Sound meter
- World clock
More tools
ToolKK
Download freeToolKKEveryday toolbox · iOS and Android
ToolKK
ToolKK: 1,000+ everyday tools
Calculate, convert, measure, edit images, and handle PDFs—all in one app.
Stop installing a separate app for every calculation, conversion, measurement, or file task. ToolKK brings a scientific calculator, unit converter, image compressor, PDF converter, QR tools, screen ruler, protractor, bubble level, world clock, and random decision tools into one searchable toolbox.
1,000+everyday tools
Searchfind the right tool fast
Search by task
Calculator, converter, ruler, PDF and image tools
Built around common utility searches. Type a tool name or browse measurement, calculation, image, document, and randomizer categories.
Calculators and converters
For study, work, personal finance, and everyday math.
- Scientific calculator
- Unit converter
- Date calculator
- Loan calculator
- Currency converter
- Base converter
Image and PDF tools
Handle common image and document jobs in one place.
- Image compressor
- Image crop
- Format converter
- Image to PDF
- PDF merge
- PDF split
Random choice tools
Make a quick pick for games, groups, and everyday decisions.
- Decision wheel
- Coin flip
- Random number
- Random picker
- Team generator
- Drawing lots
Find tools by name
Search for ruler, protractor, bubble level, world clock, calculator, and related utilities in seconds.
Calculate and convert
Use a scientific calculator, date and loan calculators, currency tools, and common unit converters.
Work with images and PDFs
Compress, crop, and convert images, create PDFs from images, then merge or split PDF files.
Make a random decision
Spin a decision wheel, flip a coin, generate a random number, or run a quick draw.
ToolKK 5.0 preview
Search once and jump straight to the right tool
Find a ruler, protractor, level, or world clock, then move into calculators, converters, decision tools, image utilities, and PDF workflows.
Less app switching
Useful for work, study, development, and daily life
Keep small, frequently needed utilities in one app instead of searching for and installing single-purpose tools.
Work and documents
Compress images, convert formats, and create or merge PDFs with fewer app switches.
Study and measurement
Keep a scientific calculator, unit converter, screen ruler, and protractor close by.
Everyday tasks
Use date and loan calculators, a world clock, bubble level, and compass when needed.
Development and debugging
Work with JSON, encodings, timestamps, hashes, and QR codes from one toolbox.
Frequently asked questions
About the ToolKK toolbox app
Quick answers about tools, search, platforms, and downloads.
What is ToolKK?
ToolKK is an all-in-one utility and toolbox app that combines calculators, converters, measurement tools, image and PDF utilities, QR tools, and developer tools.
Which popular tools are included?
Popular tools include a scientific calculator, unit converter, screen ruler, protractor, bubble level, world clock, decision wheel, coin flip, image compressor, PDF converter, and QR code generator.
How do I find a tool quickly?
Search by tool name or browse categories such as measurement, calculation, image, document, date, finance, and randomizers. You can also save frequently used tools as favorites.
Which devices does ToolKK support?
ToolKK is available for iOS, iPadOS, macOS, and Android. This page displays the App Store, Google Play, or official Android download channels available in your region.
Keep an everyday toolbox in your pocket
Download ToolKK free. The next time you need to calculate, convert, measure, decide, or work with an image or PDF, search once and get started.
Available for iPhone, iPad, macOS, and Android. Download availability varies by region and storefront.