Celestial field notes for Earth and sky
Practical field notes for navigating without signal, measuring what is around you, sharing position privately, and exploring the sky with SIMT.
In season
Time-sensitive field notes for events worth planning before they arrive.
Start here
Begin with the complete toolkit, understand offline navigation, then see why one connected spatial app works better than four separate tools.
Core guide
SIMT is an offline-first spatial toolkit that combines planning, tracking, measurement, local sharing, Wear OS sync, advanced GNSS, automation, and astronomy in a single Android experience.
Offline navigation guide
The best offline navigation app is not just one that caches maps. For weak signal, indoor, and underground use, you need fallback behavior, direction tools, target recovery, and workflows that stay useful when standard GPS breaks down.
Why one app beats four
Most people carry four or five separate apps for navigation, measurement, local sharing, and sky tracking. SIMT combines all of those into one offline-first toolkit, and the integrated experience is better than the sum of the parts.
Choose a bearing
Follow the part of the spatial toolkit that matches what you are trying to do.
Compass, targets, offline fallbacks, and route planning when the network is unreliable.
23 guidesIndoor and underground guidance with Track+, checkpoints, motion sensing, and practical recovery flows.
12 guidesConnect, local Wi-Fi location sharing, and nearby-device coordination without cloud dependence.
7 guidesRay, Measure, Plumb Bob, and on-device tools for distance, area, and alignment work.
8 guidesPlanets, Moon phases, satellites, celestial targets, and the live Orrery experience.
15 guidesPrivate-by-default storage, optional backup, TalkBack support, haptics, and accessible direction finding.
13 guidesEditorial stream
New field notes, product explainers, and practical experiments from across SIMT.
Beyond 2D roads
In McGregor, Texas, Tesla’s next-generation Roadster prototype just climbed an inverted wall on fan suction and vaulted over five parked EVs on 10 cold-gas rocket nozzles. Whether you call that flying or falling with style, one thing is certain: the second your wheels leave the pavement, turn-by-turn road maps lose their minds—and 3D spatial instruments like SIMT start making sense.
Small screen. Big adventures.
Find the way back. Follow the last light. Feel the moment you cross a boundary. SIMT brings a target compass, a living Sun and Moon dial, geofence alerts and a gravity-powered level to the screen already on your wrist.
Total solar eclipse 2027
On August 2, 2027, the longest total solar eclipse visible from land this century sweeps across southern Spain and all of North Africa — Morocco, Algeria, Tunisia, Libya, Egypt — before crossing Arabia. It lasts up to 6 minutes 23 seconds, and nothing longer touches land until 2114. The eclipse is a year away: the perfect time to plan it, and SIMT does the planning offline.
Measurement field note
A real plumb bob is a weight on a string that shows exactly where down is. SIMT puts one in your phone: a 3D pyramid that hangs along Earth's gravity vector and tells you, to a fraction of a degree, whether a wall is plumb, a counter is level, or a frame hangs straight — with no internet, no spirit level, and no magnetometer to fight.
Meteor shower 2026
Every December, the strongest meteor shower of the year lights up the sky — and in 2026 the Geminids peak on the night of December 13–14 under a nearly moonless sky. No telescope, no app with signal, no plan required: just a dark horizon, warm clothes, and the right night. Here is exactly when to look, where to look, and how SIMT keeps you oriented with zero internet.
LEO PNT deep dive
Xona has one production-class navigation satellite broadcasting from low Earth orbit and a 258-satellite plan for what comes next. Pulsar is real, ambitious, and not yet a global GPS replacement. Here is what has actually been demonstrated, what remains a target, and why the receiver in your hand matters as much as the spacecraft overhead.
Use cases and feature depth
Use this blog to understand which SIMT feature fits your situation, whether you are trying to find a car underground, coordinate over the same local network, measure a room, follow planets and satellites, or keep your data private by default.
Behind the app
SIMT is founded, designed, and built by Said Elimam — a Paris-based engineer, filmmaker, and music composer. That blend of disciplines is why SIMT pairs precise, offline-first engineering with an interface that aims to feel calm, considered, and genuinely useful in the field.
More about Said ElimamFocused on practical SIMT use cases, feature walkthroughs, and product explainers.
Read about Track+, Connect, Ray, Wear OS support, astronomy tools, Qibla guidance, backup options, and privacy-first workflows.
