MasterTool · House #35,562

What it is

Calls itself “calculators” and “converters”.

• Calls itself: calculators · converters

“…library of 2,613 free online calculators and converters”

Where it puts itself

Rules out “paywalls” and “sign-up”.

• Says it will not: paywalls · sign-up

“There are no paywalls, trials or premium tiers.”

“…no sign-up, no server receives your inputs.”

What it costs

A free tier, free forever. No monthly or yearly plan. No one-time option.

• One-time: no
• Monthly: no
• Yearly: no
• Free plan: free forever

“Free, no sign-up All 2619 tools are free to use, as often as you like. No accounts, no paywalls.”

“All 2619 tools are free to use, as often as you like. No accounts, no paywalls.”

How it runs

A web app. Runs locally and works offline. No API. Built with Google Analytics.

• Kind: web
• Runs where: on the device, offline
• API: no
• Analytics: Google Analytics

“Every calculation runs 100% client-side in your browser”

“…no server receives your inputs.”

What it works with

Names Amazon FBA Fee Calculator, Etsy Fee Calculator and 5 more on its pages.

• Names: Amazon FBA Fee Calculator · Etsy Fee Calculator · Mulch Calculator · +4

“Amazon FBA Fee Calculator”

“Etsy Fee Calculator”

What it offers as proof

Live, no waitlist. Claims “2,613”. Try it without signing up.

• Number claimed: 2,613
• Trial asks for: nothing

“…no sign-up, no server receives your inputs.”

“MasterTool is a library of 2,613 free online calculators and converters”