Artemis Mission Tracker vs One Light Day
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Artemis Mission Tracker
Follow humanity's return to the Moon and NASA's Moon Base program. Get live countdowns to mission milestones, crew profiles, and mission overviews. Access curated launch history and important mission documents.
- Live countdowns to mission milestones
- Full crew profiles
- Mission overview with SLS, Orion, Starship HLS, and Gateway context
- NASA announcements and live event alerts
- Curated launch history
- Key mission documents
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ARTEMIS MISSION TRACKER: EVERY ARTEMIS MISSION IN ONE APP Follow NASA's return to the Moon. Artemis II flew four astronauts around the Moon in April 2026, the first crewed lunar mission in more than fifty years. Artemis III is next: a crewed docking rehearsal in Earth orbit with the Starship HLS and Blue Moon landers, ahead of the first landing, now planned for Artemis IV. FREE IN THE APP • A countdown to Artemis III, kept in step with the latest launch schedule. • All five Artemis missions at a glance, from the first SLS flight in 2022 to the missions still ahead. • Crew profiles for Artemis II (Wiseman, Glover, Koch, Hansen) and Artemis III (Bresnik, Parmitano, Rubio, Douglas). • The hardware explained: SLS, Orion, Starship HLS, Blue Moon Mk2 and the AxEMU spacesuit. • Step-by-step mission timelines. • Mission updates in the app, and optional alerts when launch dates move or crews are named. • Made for iPhone Duo: two columns unfolded, a compact layout folded. ARTEMIS+ (PREMIUM) • The Artemis Briefing: Wednesday deep-dives and a short Sunday Week Ahead, plus member-only mission notes inside the app. • Live tracking and telemetry, including a 3D replay of the whole Artemis II flight from launch to splashdown. • Space weather: solar flares, coronal mass ejections and geomagnetic storms, with a home screen widget. • NASA mission photos and videos. Sober coverage, no clickbait. Monthly ($3.99 with a 7-day free trial) or yearly ($19.99). Cancel anytime. SUBSCRIPTION DETAILS • Artemis+ Monthly: $3.99 per month, includes a 7-day free trial • Artemis+ Yearly: $19.99 per year Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage your subscription and turn off auto-renew in your Apple Account settings after purchase. Any unused portion of a free trial period is forfeited when you purchase a subscription. Terms of Use (EULA): https://artemistracker.app/terms-of-use.html Privacy Policy: https://artemistracker.app/privacy-policy.html BUILT BY SPACE NERDS Made in Norway by Orbital Momentum AS, an independent developer who watches every launch. No ads, no gimmicks, just a clean tool for following the Moon program. Header image: NASA. Artemis Mission Tracker is independent and not affiliated with NASA. Clear skies.
One Light Day
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One Light Day is a free digital monument celebrating Voyager 1, humanity’s farthest spacecraft. On 18 November 2026, Voyager 1 is expected to reach a remarkable symbolic milestone: a distance from Earth that light takes approximately twenty-four hours to cross. One Light Day transforms that immense distance into a personal and interactive experience. DISCOVER THE JOURNEY Follow Voyager 1 from its 1977 launch, past Jupiter and Saturn, through the heliopause and into interstellar space. EXPERIENCE THE DISTANCE See its estimated distance from Earth, one-way light time and the countdown to the one-light-day horizon. MEET VOYAGER 1 Examine and interact with a detailed 3D model of the spacecraft that has travelled farther than any other human-made object. EXPLORE THE GOLDEN RECORD Discover the sounds, images, greetings and scientific symbols selected to represent Earth to the cosmos. FIND VOYAGER IN THE SKY Use your iPhone’s location and motion sensors to face the estimated direction of Voyager 1. SEND A SYMBOLIC LIGHT Begin with prime numbers, then encode a short human word as flashes of light. After sending it, follow a twenty-four-hour chronograph representing the photon’s journey. A FREE EXPERIENCE One Light Day contains no advertising and requires no subscription. Every experience is available to everyone. Optional contributions help maintain the app and its website but never unlock additional functionality. Voyager 1 will remain humanity’s farthest pioneer, our avant-garde in interstellar space. One Light Day is an independent educational, cultural and artistic tribute. It is not affiliated with or endorsed by NASA or JPL. Scientific distances, directions and times are estimates and are not real-time telemetry.
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Verdict
The clearest difference is iOS requirement: One Light Day at 18.0 against Artemis Mission Tracker's 26.4. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Artemis Mission Tracker sells 7 in-app purchases, starting at $3.99 per month and One Light Day sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
| Parameter | Artemis Mission Tracker | One Light Day |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) — better | — |
| Positive reviews | 24.1% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 5 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 26.4 | 18.0 — better |
| Further details — not scored | ||
| Size | 25 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Orbital Momentum AS | Jean Marc Moro |
In-app purchases
Artemis Mission Tracker
- Artemis+ Monthly7 Days trial$3.991 Month
- Artemis+ Yearly7 Days trial$19.991 Year
- Small Tip$1.99
- Mission Control$3.99
- Medium Tip$4.99
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- Large Tip$9.99
- Artemis+ Lifetime$49.99
One Light Day
- Small Signal$0.99
- Bright Signal$1.99
- Farther Signal$2.99
Show 1 moreShow fewer
- One Light Day$4.99
Questions
Is Artemis Mission Tracker free?
Is One Light Day free?
Do Artemis Mission Tracker or One Light Day have ads?
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