Free tools
Calculators and resources used by developers and entrepreneurs worldwide. No signup, no limits.
💰 Software development cost calculator
Get a realistic price range for your app, web or custom software in 2 minutes. Use it before requesting quotes.
Calculate my project → 2026 guide📊 Software development cost in 2026
Real price ranges by project type, cost multipliers, and a template to get comparable quotes from agencies.
Read guide → under 30 minutes🤝 Talk to RoviDev
Need custom software or automation? Share your context and we'll respond with an initial range and next steps.
Request contact →Need a custom tool, app or automation?
These utilities capture informational searches; if you want to solve a business process, we can turn the idea into software: a fast web app, an internal dashboard, an AI assistant or a mobile app connected to your systems.
Software development cost calculator
Estimate your app, web or software project cost in minutes. By type, complexity and timeline. Widely used.
Use tool →Project & startup name generator
Generate name ideas for apps, startups and products. By style. Free.
Use tool →Character & word counter
Count characters, words and reading time. For Twitter, LinkedIn, SEO and copy. Very popular.
Use tool →Secure password generator
Generate strong random passwords. Configurable length and characters. Very searched worldwide.
Use tool →Lorem Ipsum generator
Placeholder text for mockups and designs. Paragraphs or words. Used by designers worldwide.
Use tool →Percentage calculator
What is X% of Y, what % is A of B. Instant calculations. Widely used.
Use tool →Overtime calculator
Calculate overtime pay: hourly rate, regular and overtime hours, 1.5x or 2x multiplier.
Use tool →BMI calculator
Body mass index: underweight, normal, overweight, obese. Very searched worldwide.
Use tool →Tip calculator
How much to tip and total to pay. Split between people. Popular for travel.
Use tool →Case converter
UPPERCASE, lowercase, Title Case or aLtErNaTiNg. For titles and SEO.
Use tool →Random number generator
Random number between min and max. For giveaways, tests and games.
Use tool →UUID v4 generator
Unique identifiers for databases and APIs. One or multiple. Used by devs worldwide.
Use tool →Base64 encoder
Encode and decode text to Base64. For URLs, APIs and data.
Use tool →JSON formatter & validator
Pretty print, minify and validate JSON. Used by developers worldwide.
Use tool →Unix timestamp converter
Timestamp to date and date to Unix. Seconds or ms. Very searched by devs.
Use tool →Days between dates
How many days between two dates. Deadlines, vacations, projects. Widely used.
Use tool →Dice roller
Roll a dice online: 6-sided or 4, 8, 10, 12, 20. Games and raffles.
Use tool →Unit converter
cm to inches, kg to lbs and vice versa. Daily use worldwide.
Use tool →Age calculator
How old you are in years, months and days. Next birthday. Widely searched.
Use tool →Random color generator
Random hex color for design and dev. Copy the code.
Use tool →Countdown timer
Count down to a date and time. Events, deadlines, key dates.
Use tool →Discount calculator
Final price with discount and savings. Sales and deals. Widely used.
Use tool →Temperature converter
Celsius, Fahrenheit and Kelvin. Cooking, science and travel.
Use tool →Mortgage calculator
Estimated monthly payment: principal, rate and term. Indicative.
Use tool →QR code generator
Create QR from URL or text. Download PNG. No signup.
Use tool →VAT calculator
Add or remove VAT from price. 20%, 10%, 5%. Widely used.
Use tool →Palindrome checker
Does it read the same forwards and backwards? Check instantly.
Use tool →Reverse text
Flip text right to left. Copy result.
Use tool →Speed calculator
Speed, distance or time: enter two and get the third.
Use tool →Online stopwatch
Digital stopwatch: start, pause, reset. Workouts, study, cooking.
Use tool →Daily calorie calculator
How many calories you need per day (TDEE). Weight, height, age, activity.
Use tool →GPA calculator
Grade average with weights. For students. Free.
Use tool →FAQ
Are they free and signup-free?
Yes. Everything runs in your browser, no watermark, no rate limits, no data stored.
Useful for companies?
Product, finance and engineering teams use the cost calculator, JSON formatter, UUID and password generator daily. We also build internal custom tools.
Can I estimate my software cost?
The cost calculator returns a realistic range in 2 minutes. For a firm quote, contact us from inside the tool.
How do I contact you?
From /en/contact/ or any service landing. First reply usually in under 30 minutes with assessment and indicative range.
Looking for custom software?
Beyond free tools, we build complete software projects organized by goal and tech stack.
React & Next.js · Node.js & APIs · Python & automation · AI & LLM
See all servicesNeed us to build your project?