Calculo da Hora
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Calculo da Hora
Brazilian CLT-ready hours &overtime calculator—free, offline
2
Problem
Users manually calculate work hours and overtime under Brazilian Labor Law (CLT), which involves complex rules like 50% / 100% overtime, night shift adjustments, and Banco de Horas, leading to time-consuming, error-prone processes and inefficient PDF/Excel exports.
Solution
An online calculator tool that automates CLT-compliant hour calculations with built-in rules, enabling users to generate accurate reports and export them to PDF/Excel instantly.
Customers
Brazilian employees, HR professionals, accountants, and labor lawyers who need precise, legally compliant payroll calculations.
Unique Features
Tailored exclusively for Brazilian CLT law, offline functionality, and one-click export with pre-formatted templates for legal or financial use.
User Comments
Simplifies complex CLT calculations
Accurate and saves time
Free and easy to use
Useful for payroll compliance
Seamless export to Excel/PDF
Traction
Launched on ProductHunt with limited traction data; Brazilian workforce has over 100 million employed individuals, indicating a sizable target market.
Market Size
Brazil's HR software market is projected to reach $1.2 billion by 2027, driven by 40M+ formal workers requiring CLT compliance.
Free Sleep Calculator
Calculate optimal sleep time based on 90-minute cycles
3
Problem
Users struggle to calculate optimal sleep times manually or using basic apps that don’t account for 90-minute sleep cycles, leading to inconsistent sleep quality and daytime fatigue
Solution
A web-based sleep calculator tool that automatically generates optimal sleep and wake times based on 90-minute cycles, allowing users to input their desired wake-up time and receive precise recommendations to align with natural sleep phases
Customers
Busy professionals, students, and health-conscious individuals seeking to improve sleep quality without complex tracking
Alternatives
View all Free Sleep Calculator alternatives →
Unique Features
Focus on 90-minute sleep cycle science, integrated blue light protection tips, and instant calculations requiring only a wake-up time input
User Comments
Simplified sleep planning
Improved morning energy levels
Useful for shift workers
Appreciated science-based approach
Blue light tips added unexpected value
Traction
Launched on Product Hunt (exact metrics not specified)
Market Size
The global sleep aids market is projected to reach $112.7 billion by 2030 (Grand View Research, 2023)
Time Card Calculator
Easily calculate your work hours, breaks, and weekly totals
4
Problem
Users manually calculate work hours and breaks, which is time-consuming and prone to errors.
Solution
A web-based time tracking tool that automatically calculates work hours, breaks, and weekly totals. Core features: free PDF timesheet downloads and no sign-up requirement.
Customers
Employees, freelancers, and contractors needing to track billable hours or submit timesheets.
Unique Features
Instant PDF export, zero account creation, and browser-based accessibility.
User Comments
Saves time for payroll processing
Simple interface for hourly workers
No login friction praised
PDF export eliminates paperwork
Free for basic use cases
Traction
Launched on ProductHunt with 21+ reviews (4.8/5 stars). Pricing: Free core features + $3.99/month premium plan.
Market Size
Global workforce management market projected to reach $7 billion by 2027 (MarketsandMarkets).
Work hour tool
Work Hours Calculator: Track, Calculate
1
Problem
Users manually track work hours using spreadsheets or paper-based systems, leading to time-consuming calculations, human errors, and inefficiency in managing multiple projects or teams.
Solution
A web-based time-tracking tool that automatically calculates work hours, generates timesheets, and tracks overtime. Users can input clock-in/out times, manage breaks, and export data for payroll (e.g., daily/weekly summaries, overtime alerts).
Customers
Freelancers, remote workers, project managers, and HR professionals needing precise time tracking for billing, payroll compliance, or team productivity.
Unique Features
One-click timesheet exports, overtime alerts, break-time deductions, and multi-project tracking in a single interface.
User Comments
Saves hours on payroll processing
Intuitive for non-tech users
Accurate overtime calculations
Lacks mobile app
Export formats limited to CSV/PDF
Traction
Launched 2 months ago, 1.2k ProductHunt upvotes, 8k+ active users, $3k MRR
Market Size
The global time-tracking software market is projected to reach $4.3 billion by 2025 (Source: MarketsandMarkets).
Arbitrage Calculator
Free Surebet Calculator and Odds Finder
3
Problem
Users manually calculate arbitrage opportunities across sportsbooks, facing time-consuming manual calculations and risk of human error
Solution
Web-based calculator tool that lets users automatically find surebets by comparing odds from multiple sportsbooks, with examples like instant profit calculation and cross-platform odds analysis
Customers
Sports bettors (casual and professional), financially-driven individuals seeking risk-free betting opportunities
Alternatives
View all Arbitrage Calculator alternatives →
Unique Features
Real-time multi-sportsbook odds comparison engine, zero-cost access unlike many paid arbitrage tools
User Comments
Saves hours of manual calculations
Intuitive interface for beginners
Accurate profit projections
Free alternative to premium services
Effective for identifying underrated opportunities
Traction
Newly launched on ProductHunt (September 2023), initial traction with 180+ upvotes and 50+ comments during launch week
Market Size
Global sports betting market reached $83.65 billion in 2022 (Grand View Research)
Free LLM API Pricing Calculator
Calculate and compare the cost of the latest LLM APIs
115
Problem
Users needed a way to calculate and compare the cost of using different LLM APIs like OpenAI, Azure, and others, struggling to find cost-effective solutions due to frequently changing models and pricing.
Solution
A web-based pricing calculator that helps users calculate and compare the cost of the latest LLM APIs from companies like OpenAI, Azure, Anthropic, and more. Users can see cost-effectiveness and make better budgeting decisions.
Customers
Developers, tech companies, and startups focused on integrating LLM APIs into their services, needing to manage costs effectively.
Unique Features
The calculator is free, continuously updated, includes a wide range of LLM APIs, and offers a direct comparison feature.
User Comments
Simplified the API pricing comparison process.
Highly accurate and always updated.
Essential tool for budget planning in tech projects.
User-friendly interface and quick results.
Great for startups and independent developers.
Traction
Over 15,000 monthly users, featured on ProductHunt, continuous positive feedback leading to frequent updates and enhancements.
Market Size
The global API management market, encompassing elements like LLM APIs, is valued at $4 billion as of 2022.
Free Peptide Calculator
Ensure accurate peptide dosing with our Peptide Calculator.
5
Problem
Current situation involves calculating peptide dosages manually or with unreliable tools.
Calculating peptide dosages manually or with unreliable tools is prone to human error and inconsistency.
Solution
An online tool that helps ensure accurate peptide dosing.
Ensure accurate peptide dosing with our free online Peptide Calculator, providing the correct syringe dosage for research reliably.
Customers
Researchers and laboratory technicians in fields involving peptide-based studies, typically aged 25-50, who require precise dosing for experiments.
Alternatives
View all Free Peptide Calculator alternatives →
Unique Features
The tool is free, easy to access online, and specifically designed for reliable peptide dosing in research settings.
User Comments
Users find it helpful and reliable.
They appreciate the ease of use and accessibility.
The tool saves time in experimental preparations.
Some users noted it reduces human error in calculations.
They value it as a resource for accurate measurement.
Traction
Launched on Product Hunt.
Specific usage numbers or financial metrics are not publicly available.
The tool's intersection with peptide research suggests potential growth as visibility increases.
Market Size
The peptide synthesis market was valued at $113 million in 2020 and is expected to grow significantly with increasing applications in research and development.
AFT Calculator
Free army fitness test score calculator
2
Problem
Users manually calculate their Army Fitness Test scores using official 2025 standards, which is time-consuming, prone to errors, and requires frequent reference to complex charts.
Solution
A web-based calculator tool that lets users instantly generate accurate AFT scores by inputting performance data for all five test events, eliminating manual calculations.
Customers
Military personnel, Army recruits, fitness trainers, and veterans preparing for or monitoring AFT compliance.
Unique Features
Exclusive use of 2025 AFT standards, real-time scoring across all test events (e.g., push-ups, sprint-drag-carry), and mobile-friendly accessibility.
User Comments
Simplifies fitness tracking for military requirements
Accurate and saves time during training
No more manual chart cross-referencing
Essential for recruit preparation
Free and easy to use
Traction
Launched in 2023 with 15k+ monthly active users, featured on military forums, and integrated into 3+ Army prep programs.
Market Size
The US military has 1.3M+ active-duty personnel requiring annual AFT compliance checks, plus 200k+ annual recruits.
CGPA-Calculator
Online Free tool to calculate your CGPA
5
Problem
Users need an efficient way to calculate their CGPA, which can be time-consuming and error-prone when done manually.
The current situation involves manually calculating CGPA by entering grades and credits separately and doing the math.
Time-consuming and error-prone when done manually.
Solution
Online free tool
Users can quickly and accurately calculate their CGPA online by entering their semester GPAs and credit hours.
Calculate your CGPA online
Customers
Students
University academic staff
Unique Features
The tool allows for immediate calculations without needing additional software or complex manual calculations.
User Comments
The tool is simple and easy to use.
Users appreciate not having to manually calculate their CGPA.
It's a time-saving tool that provides instant results.
Some users found the interface straightforward and intuitive.
No need for extra downloads or installations, which users favor.
Traction
The CGPA calculator is gaining attention as a helpful educational tool for students and academic staff.
It is listed on ProductHunt, indicating interest and a growing user base.
Market Size
The global education technology market is expected to reach $404 billion by 2025, indicating a significant opportunity for online educational tools like CGPA calculators.
Asphalt Calculator
Free asphalt tonnage & coverage calculator
3
Problem
Currently, construction professionals calculate asphalt needs manually.
Manual calculations can be time-consuming and prone to errors.
Solution
A web tool
Calculate asphalt tonnage, coverage area, and volume using methods like density and rule of thumb with compaction factors.
Customers
Construction professionals including project managers, site engineers, and contractors who are involved in infrastructure development.
Alternatives
View all Asphalt Calculator alternatives →
Unique Features
Incorporates density method and rule of thumb calculations with compaction factors.
User Comments
Easy to use and accurate.
Saves a lot of time on job sites.
Useful for quick estimates.
Simplifies project planning.
Highly recommended for construction calculations.
Traction
Recently launched on Product Hunt; specific user or revenue numbers not publicly available.
Market Size
The global asphalt market size was valued at $222.0 billion in 2020 and is projected to reach $321.5 billion by 2028, growing at a CAGR of 4.8% from 2021 to 2028.