Write it once. ESMS quietly watches for signal — even one bar — and sends your message the instant it's reachable. No app to babysit, no signal to chase.
ESMS checks quietly in the background. The instant even one bar appears, your message goes out — no need to open the app.
Turn it on and ESMS keeps retrying until the message is confirmed sent — built for situations that don't get a second chance.
Your last known position is added automatically at the moment you write the message — so whoever reads it knows where to look.
Pick SIM 1, SIM 2, or leave it on auto and ESMS sends through whichever card finds signal first.
Enter a number and your message before you lose signal — on the trailhead, at the airport, before you head into the woods.
No open app, no battery drain from constant checking. ESMS stores it securely and waits for a signal to appear.
As soon as signal returns — one bar is enough — your message and location go out automatically.
Installing outside Google Play requires enabling "install from unknown sources" in your Android settings. ESMS is open about what it accesses — check the Privacy Policy before installing.
ESMS is free for personal, non-commercial use. If your organization wants to deploy it for staff, integrate it into a product, or use it commercially in any other way, you'll need a commercial license.
Tell us a bit about your use case — we'll get back to you by email.
ESMS