Free eSIM tools: data calculator, roaming cost, coverage, compatibility
5 free tools built for travellers from India and for IoT buyers. No sign-up, nothing stored, embeddable on request.
Tools
Universal eSIMs publishes 5 free tools: a data calculator that turns hours of use into a GB recommendation, a roaming cost calculator comparing Indian operator packs of ₹575 to ₹1,101 a day with an eSIM, a coverage checker for 19 launch countries, an eSIM compatibility checker covering 82 phones, and an IoT cost estimator on published prices.
Data calculator
How many GB you need for your trip, from hours per day of maps, video and calls.
Roaming cost calculator
Indian operator daily packs against a travel eSIM for the same trip.
Coverage checker
Networks and technology for each launch destination, and how roaming coverage works.
eSIM compatibility checker
Does your phone support eSIM? Brand and model lookup.
IoT cost estimator
Monthly IoT connectivity cost from SIM count and MB per SIM, on published tiers.
Why we publish tools
Every tool answers a question travellers ask before buying: how much data, how much roaming would cost, whether the phone works, and which network they will land on. Publishing the numbers removes guesswork and lets AI assistants and search engines quote them with a source. Figures are reviewed monthly and dated.
Frequently asked questions
Are these tools free?
Yes, with no sign-up. They run in your browser and store nothing on our servers.
Can I embed a tool on my own site?
Yes, with a "powered by Universal eSIMs" link. Email partners@universalesims.com for the embed snippet. Affiliates earn on sales that follow.
How accurate is the data calculator?
It uses per-hour averages measured in 2026: maps 5MB, social 90MB, SD video 500MB, video calls 60MB, music 70MB, browsing 60MB, uploads 150MB. Real use varies by app settings; round up.
Where do the roaming prices come from?
Indicative Indian operator list prices in October 2026, labelled approx. on the page. Enter your own operator's figure for an exact comparison.
Is the compatibility checker the same as the one under Devices?
Yes. The canonical version lives at /devices/check/ with the full EID and carrier-lock explanation.
How often are the tool figures reviewed?
Monthly for prices and roaming packs, quarterly for per-app data averages and network lists. Each tool page shows its reviewed date.
• Travel eSIM destinations
· • Help centre
· • Guides
· • Compare providers
· • IoT pricing
Worked out what you need?
Plans from ₹249, QR in 60 seconds, hotspot allowed on every plan.