AppBanana vs calculate.at

AppBanana connects developers with real human testers to ensure their Android apps pass Google Play's closed testing requirements. Designed for indie developers and startups, it streamlines the testing process, providing 12 to 25 testers who engage with your app daily for 14 days. Get feedback, fix issues, and achieve approval without the hassle of traditional testing methods.

With a 100% approval guarantee or your money back, AppBanana eliminates the stress of rejections. The onboarding process is quick, taking less than an hour, and you can expect real-time support throughout your testing phase. Developers can submit their app link and let AppBanana handle the rest, ensuring a smooth path to production access.

Best for: Indie developers and startups needing app testing.

• User feedback
• App approval
• Beta testing
• Closed testing

See the full listing - AppBanana on ScrollLaunch.

calculate.at is a free, no-signup calculator platform with more than 290 tools covering everyday finance, health, math, construction, science, unit conversion, dates, and a handful of casual games. There's no account to create, no email to hand over, and no paywall anywhere on the site — every calculator loads instantly and gives an answer in the browser.

The core idea behind the site is transparency. Most calculator tools online just spit out a number with no explanation, making it impossible to know whether the result is right. calculate.at does the opposite: every page shows the formula behind the result, walks through a couple of worked examples with real numbers, and directly answers the specific questions people search for around that topic. That means a user can check the math themselves instead of trusting a black box — useful for students verifying homework, freelancers double-checking a tax figure, or anyone who wants to understand how a number was derived rather than just copy it.

The catalog is organized into six categories — Math, Health, Conversion, Finance, Date & Time, and Games — ranging from everyday tools (percentage calculators, tip splitters, unit converters, BMI, date-difference calculators) to more specialized ones like mortgage amortization schedules, body-fat estimates, sales tax by jurisdiction, and construction material quantity estimators. New calculators are added regularly, prioritized by what people are actually searching for rather than a fixed roadmap.

Pages are lightweight, load fast, and don't bury the calculator under intrusive ads. The goal is that someone lands from a search result, gets their answer in seconds, and can see exactly how it was calculated if they're curious.

calculate.at is built for anyone who needs a fast, verifiable answer without friction: students, freelancers doing quick financial math, homeowners planning a renovation, or anyone who just typed "what is 15% of 240" into a search bar.

Best for: Anyone needing quick calculations without signup.

• Percentage calculation
• Sales tax calculation
• Health metrics
• Unit conversion
• Date calculations

See the full listing - calculate.at on ScrollLaunch.