Engravings, screenshots and listing copy, available for writing about Plenilune.
About thirty words, to add Plenilune to a roundup already online.
Plenilune (iOS, free with an optional subscription): a moon almanac where the moon isn't a photograph but an engraving recomputed every night from the ephemerides. Today's phase, rise and set, eclipses visible from where you are, and the twelve named full moons. All computed on device. plenilune.app
App Store promo codes are set aside for the press. One line is enough: I'll reply with a code, and with answers to any technical questions. No exclusivity asked for, no copy approval.
Bare screens in the language of this page, light and dark side by side. JPEG, 1320 × 2868 px: click an image to download it. The original PNGs are available on request.
The four widget families, cut out with transparent corners. PNG, light and dark.
The same screens on a 13-inch iPad, light and dark. JPEG, 2064 × 2752 px.
The eight images of the listing, headline baked into the pixels, for an opening illustration. JPEG, 1320 × 2868 px, same language as this page.
It follows the system theme. PNG, 1024 px.
One per named full moon, drawn by hand, in a light and a dark version. PNG, 768 px. Source files on request.
For a short item or an app-of-the-day slot.
Plenilune is an almanac of the sky for iPhone and iPad. Each night the Moon is an engraving redrawn from its real position: the shadow line, the libration, the tilt at your latitude. Each morning, a sourced almanac entry: something in the sky, an old saying, a piece of folklore. Plus rise and set times, the eclipses visible from where you are, and four widget families. No account, no ads, no network needed.
For a review or a longer feature.
Plenilune is a moon almanac for iPhone and iPad, made by one person: an illustrator by trade, Rémy Boiré drew the engravings, wrote the text and programmed the astronomical engine. That engine follows Jean Meeus (Astronomical Algorithms, ch. 47–49) for phase, libration and position, and adds rise and set with the standard refraction correction, plus eclipse prediction, computed for the observer's position and flagged only when the eclipse will actually be visible there. A test suite checks it against a table of real full moons. Nothing depends on a server: everything is computed on the device. The difference shows on screen. Plenilune's moon is neither a NASA photograph nor one of twenty-eight images on rotation: it is a hand-drawn line, redrawn each night from the geometry of the moment. The hatching comes from the hand, the geometry from the sky. Each morning the app offers an almanac entry drawn from five registers: the sky, history, folklore, old sayings, nature. Always sourced, and never a prediction. Each of the twelve named full moons has its own page and its own drawn emblem. Plenilune is free; an optional subscription opens the rest of the almanac.
An illustrator who wrote his own astronomical engine rather than calling an API. Offline, no account, no ads, four widget families, six languages. And one person behind all of it, drawing included.
The engine implements Meeus (Astronomical Algorithms, ch. 47–49) for phase, libration and position, rise and set with the standard refraction correction, and eclipse prediction for the observer's position. Unit tests check it against a table of real full moons. That is what made it publishable. The presentation is unusual; the numbers underneath are the point.
Most lunar illustration is twenty-eight drawings on rotation. Here the plate is drawn from the data (the shadow line, the tilt, the slight wobble of libration), so this morning's has never existed before and won't return. The hatching, the paper grain and the ink are an illustrator's; the geometry is the sky's.
What the app refuses to do is the argument: no predictions, no horoscope, no promises. It tells you where the moon is tonight, when it rises, what the month's full moon was called, and what people used to read in the sky, given as what it is: folklore, with its source.
The disc is never a photograph. Each night the app draws it as an engraving from the ephemerides of the moment: the shadow line, the libration, the tilt at your latitude.
The twelve emblems of the named full moons, the hatching and the paper grain. The daily disc itself is computed, which is why it never repeats.
The app predicts nothing and says nothing about anyone's future. Folklore appears as folklore, with its source.
Every astronomical figure is computed on the device, with no account and no advertising identifier. Two exchanges exist: a signed file of text corrections fetched at launch, and anonymous usage measurement hosted in the EU, which can be switched off in the settings.
Plenilune, one word, no accent, one capital. From the Latin plenilunium, the full moon.
Engraved lunar phase & widgets
Share tonight's Moon as a Story, a Post or a four-second clip, straight from the daily note, a day sheet or an eclipse. The Moon is engraved as it is that night.
Plenilune shows the Moon as it is tonight: its phase is computed from its real position, then drawn like an engraving. I built it end to end with one idea: bringing together, in a single app, the precision of astronomy and the beauty of engravings.
Moonrise and moonset times are computed for the place where you are, and so is the visibility of eclipses. And every morning, a moon story: a saying, a belief, a fact of astronomy.
Day to day, Plenilune lives on both the Home Screen and the Lock Screen through its widgets. It can alert you when a full or new moon approaches. Any page can be shared as an image or a short clip, with the Moon drawn as it really is that night.
Premium opens the calendar to the past and future, reveals the names and stories of the twelve traditional full moons, alerts you to rare events such as eclipses, supermoons and blue moons, and can send you the morning story. This is how Plenilune can live without advertising.
INSIDE PLENILUNE • Today's phase: name, age, illumination • Widgets for Home Screen and Lock Screen • Monthly calendar, one card per day • Moonrise and moonset, where you are • Full and new moons: next dates and notifications • Eclipses visible from where you are • Almanac page: Moon, Sun and Sky, with dawn, dusk, astronomical night and the next perigee • Share the daily note, a day or an eclipse as a Story, a Post or a four-second clip • No account, no ads, works offline
WITH PREMIUM • The complete moon story every morning • Extended calendar, past and future • Stories and engraved emblems of the twelve full moons • Rare event notifications • Sixteen engraved app icons
Plenilune Premium is offered as an auto-renewing annual subscription, or a one-time lifetime purchase. Payment is charged to your Apple Account at confirmation. The subscription renews automatically unless turned off at least 24 hours before the end of the current period; it is managed and canceled in your Apple Account settings.
Privacy Policy: https://www.plenilune.app/en/privacy — Terms of Use: https://www.plenilune.app/en/terms
App Store · contact@plenilune.app
© 2026 Rémy Boiré
