Track the eSIM plans you already own
Keep every eSIM plan straight in one place.
People often have more than one eSIM — leftover trip data, a Europe backup, a family share — and it's easy to lose track of how much data is left and when each plan ends. SimWatcher helps you organize the plans you already own: enter remaining GB from your provider app, link plans to trips, and get alerts when data is low or a plan is about to expire. We don't sell eSIMs or send you to buy pages.
Why travelers need this
Leftover and upcoming plans
Data left from an old trip sits next to your next trip's plan — it's easy to forget which one expires first.
Backup plans add up
You may keep a backup eSIM for yourself or your family, with no single place to see how much data is left.
Provider apps only see their own plans
Your carrier or eSIM app doesn't know about your other providers. SimWatcher watches every plan you add.
See how it looks
Example view (sample data). Remaining data is only as accurate as your last update — we don't read your carrier.
- OK
Airalo — Japan 10GB
3.2 GB left · Ends Oct 28 · Updated yesterday
- OK
Holafly — Asia backup
8.0 GB left · Ends Nov 12 · Updated 3 days ago
- Low
Saily — leftover EU
0.4 GB left · Ends Oct 10 · Low-data alert on
How SimWatcher works
- Sign up with an email link
- Add a plan you already have (leftover data, an upcoming trip, or a backup)
- Link the plan to a trip
- Turn on alerts for low data and upcoming expiry
- Open trip prep before you go — Pro is optional later