ED Exo Compare 1.2.1 — portable

A journal-linked exobiology companion for Elite Dangerous. It reads your local journal, merges scans and organic signals, and predicts the candidate species on a body from FSS/DSS telemetry alone — with payout ranges, first-footfall tracking, a system map, a customisable HUD and a species encyclopedia.

This release is the single-file portable build. For the unpacked program folder plus the two console builds, see v1.2.1-zip — same version, same code.

Download EDExoCompare.exe and run it. Nothing is installed.

A system map that looks like the game's, a Codex map that shows what you still have to log in each region, a rarity for every species, and each species' starlight range.

New

The system map, rebuilt to look like the game's. Stars sit in a column on the left with their barycentre brackets, planets run in rows beside their star and moons hang in columns under their planet, each pair bracketed the way the game draws it. Stars take their class's colour and size. A full ring marks an atmosphere (tinted by its gas), a two-thirds arc a landable body, a letter the body type, and badges show biological signals and the ×5 first-footfall bonus. Earth-like worlds are green. A grid sits behind it all, a stats panel opens beside the map for the body you pick, arrow keys walk from body to body, and a filter shows landable bodies only. The snapshot camera now copies the whole map, lines included.

Codex map. Encyclopedia → Codex opens the galaxy's regions. Pick a region, then Bodies or Biological, and dots show systems there with codex entries: orange for something you have never logged, yellow for some of it, green for all of it. It reads your own codex, region by region — an entry you logged anywhere in the region counts. Sample systems come from EDSM's codex.

Rarity, from Common to Legendary. Every species has a tier — grey Common, green Uncommon, blue Rare, purple Epic, gold Legendary — from how many of the bio-signal bodies it can grow on actually carry it. It is worked out per region, so a species common in one region can be rare in the next, and one not found in a region at all is marked as such. A DNA badge shows the tier before the name in compact rows, in place of the analysed tick on full cards, and in the Encyclopedia. It keeps up with you: your own codex finds are added as you make them.

Starlight. The app now works out how much starlight reaches each body (Earth's = 1), from every star in the system and its distance. The Encyclopedia shows the range each species grows under, measured over 2.8 million bodies, and how the selected body compares. For most species the range tells you nothing the temperature does not already — the light is what sets the temperature — so it is shown for reference. For six species it adds something (Bacterium volu, Concha labiata, Electricae radialem, Sinuous Tubers prasinum, Stratum araneamus and Brain Tree viride), and outside their range they are listed as unlikely rather than shown.

Fixed

Airless bodies showed an atmospheric pressure — 17.9 atm on one airless moon — from a trace value read in the wrong unit. Pressure is now read the same way everywhere, and airless bodies no longer feed the species gates a pressure.

"Not terraformable" counted as terraformable in six places, which starred bodies and inflated their scan value (one system's estimate went from 6.10 M to 1.46 M).

Plant colours on a moon whose planet was never scanned now use the moon's distance from the star, so a bright star far out is no longer missed.

Codex data provided by EDSM and EDAstro; the rarity and starlight figures come from Spansh's galaxy data. See NOTICE.md.

The first start after updating re-reads your journals once, to apply all of this to your history.

Where your data lives

%LOCALAPPDATA%\ED Exo Compare\ — settings, your LAN key, your EDSM credentials if you add them, the species you have scanned on foot, your Fix corrections, the journal folder you chose, your HUD layout, where your windows were, the systems you looked up on Spansh (kept 30 days), the shared exomastery folder, and the prediction caches. Nothing of yours is kept in the program folder, so replacing it on an update loses nothing.

Your journals are read, never copied out. Uploads to EDSM, Canonn and EDDN happen only if you turn them on yourself. Looking a system up sends only its name or number to Spansh.

Windows will say the publisher is unrecognised. The executable is not code-signed, so SmartScreen asks first: "More info" → "Run anyway".

Licence

MIT. The species photographs are not covered by it — see NOTICE.md, which names every contributor and says which images are borrowed from the ED-DSN community and on what terms. The list of Frontier-populated systems and looked-up systems come from Spansh.

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Licence correction (2026-10-01). This release contains data derived from EDAstro (CMDR Orvidius), whose content is licensed under CC BY-NC-SA 3.0. Those data files were shipped under the MIT notice by mistake: they are CC BY-NC-SA 3.0 — credit the sources, no commercial use, share alike — not MIT. ED Exo Compare is licensed in three parts: the code is MIT, the data is CC BY-NC-SA 3.0, and the species photographs are Elite Dangerous screenshots, Frontier's game art under Frontier's terms. Details in LICENSE-DATA.txt, attached to this release.