Begin with the sky you already have
NAKED-EYE
- Log the phase name and illumination percentage
- Practise placing the draggable shadow line
- No account, no sync, no sign-up
Vutrem Orbit: one Moon, shared by everyone who looks up
Drag the shadow line, log the night and keep a private record of every time you stepped outside. Works offline. No account. Nothing leaves your phone.
Download Vutrem Orbit iOS · App Store · Version 2.0- Works offline
- No account needed
- Journal stays on your device
- Any date from 1900 to 2100
- No store ratings yet: be an early voice
Tonight's Moon only happens once. Log it while it is up.
Choose your first night
Pick your observing path
Every skywatcher starts somewhere: a porch, a pair of binoculars, a borrowed telescope. Choose how you will look up tonight, copy the tag and paste it into the notes of your first Night journal entry.
Sharpen the view, track the progress
BINOCULARS
- Tag every night with your instrument and place
- Filter the journal by clear skies, notes or favourites
- Watch your estimates settle on the Illumination chart
Chase craters along the terminator
Tonight's entry window closes in
--:--:--
TELESCOPE
- Use the Feature atlas to see which craters sit near the shadow line
- Tag a hilltop cabin or your garden as the observing place
- Fill all eight phases on your coverage ring
These codes are note tags for your own journal, not discount or reward codes. Check the App Store listing for current pricing and details before you install.
Your pocket observatory
Inside the night sky toolkit
Six tools, one calm interface. Each one exists to make the next clear night more worth stepping out for.
Draggable shadow line
Drag the terminator disc to where you think the shadow falls on the Moon's face. Before you save, the app shows the computed illumination so you can see how close your eye was.
Observer record
A shadow-line accuracy gauge from sharp to rough, a ring of the eight named phases you have logged, and streak counters that reward showing up night after night.
Phase scrubber
Spin the lunation dial, slide along a 30-day night strip and nudge the hour. Any date between 1900 and 2100 shows its Moon, with upcoming phase times as you scroll.
Feature atlas
Named craters, maria and bays, sorted by what is lit now, near the terminator or in shadow. Each entry tells you when it will next cross into lunar sunrise or sunset.
Illumination chart
Your logged observations are plotted over the computed illumination curve, lunation by lunation, so you can see your own pattern emerge.
Night journal
Every logged night in one list, with phase name and percent lit. Filter by clear skies, notes or favourites, or search by note and location.
A night with Vutrem Orbit
From the doorstep to the logbook
The journal is private, but the sky is shared. The same Moon hangs over every porch, hilltop and rooftop that reads these phases.
Before you step outside
- Open the Apparition timeline to see upcoming phases grouped by lunation, with exact times.
- Read the typical crescent windows so you know which evenings to watch the horizon.
- Tap the Tonight row for details, then preview any other date on the Phase scrubber.
At the eyepiece
- Drag the shadow-line disc to your best guess of the terminator.
- Compare it with the computed illumination before saving the entry.
- Tag the observing place and instrument, such as Telescope or Hilltop cabin, and note the sky conditions.
Back indoors
- Find any night through the chips All, Clear skies, With notes and Favourites.
- Search by note or location when you remember the cabin but not the date.
- Check the Observer record: choose This lunation, Last 3 or All time.
Sharing the sky
- Nothing syncs, so your notes stay yours.
- Phase names and percent lit make it easy to compare a night with a friend, aloud or over coffee.
- Use the Feature atlas to agree on the next crater worth waiting up for.
Field notes
The mechanics behind the glow
Vutrem Orbit computes the Moon rather than streaming it. Phases and illumination come from a mean lunation model, which is why the scrubber labels its result "computed · mean lunation · ±1 day". Lunations are numbered, and crescents appear as typical windows instead of single instants.
Your own eye is part of the data. On the observation form you drag a terminator disc to where you think the shadow line falls, then see the computed value before saving. The Observer record turns those comparisons into a gauge that runs from sharp through fair to rough and states the mean error in points.
All of it lives on the phone. Entries, tags and statistics are stored locally, no account is needed and nothing is synced. The dial, night strip and hour slider cover any date from 1900 to 2100, so you can open a night from your grandparents' era or plan one far ahead.
| App name | Vutrem Orbit |
|---|---|
| Platform | iOS (App Store ID 6828437867) |
| Category | Education |
| Version | 2.0 |
| Release notes | Steadier performance overall. |
| Date range | 1900 to 2100 |
| Phase method | Computed, mean lunation, ±1 day |
| Connectivity | Offline observation journal |
| Account and sync | None required, no sync |
| Data storage | On the device only |
| Store rating | Not yet available |
Your next clear night deserves a page
Vutrem Orbit 2.0 for iOS, from the App Store. Installation takes a few taps and there is nothing to sign up for. Current price and size are shown on the App Store listing.
Download Vutrem OrbitRequires an iPhone with App Store access. Age rating and any in-app purchases are listed on the App Store page.