SunGraph vs T
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SunGraph
Calculate sunrise and sunset times for any location globally and any day of the year. Explore earliest/latest times, the equation of time, and sun inclination. Visualize the sun's position on Earth.
- Sunrise and sunset times worldwide
- Earliest and latest sunrise/sunset
- Equation of time display
- Sun inclination at transit
- World view of sun's position
- User location database
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SunGraph is a sunrise and sunset calculator showing sunrise and sunset times for anywhere in the world and for any day of the year. For any latitude the earliest and latest sunrise and sunset times will be displayed. The analemma screen displays the equation of time along with the inclination of the sun above the horizon at transit. A world view shows the location of the sun on the Earth for the current time, or any day of the year. A data base can store user locations.
T
Track upcoming US rocket launches with detailed information on timing, status, and weather. Offers a free version with essential features and an optional Premium subscription for advanced tools like widgets and Live Activities.
- Browse upcoming launches
- View launch details (timing, status, weather)
- Follow specific missions
- Mobile launch alerts
- Premium widgets and Live Activities
- AR Trajectory on supported devices
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Launch day, from your point of view. Track upcoming SpaceX, NASA, and Blue Origin launches in one launch schedule. Find the next rocket launch, check local times, and follow changes to the missions you care about—with no ads. FREE TO EXPLORE Browse the launch schedule, search past and upcoming missions, use filters, and open official webcast links without an account. Find missions such as Starship and Artemis, focus on Kennedy Space Center, Cape Canaveral, or Vandenberg. See local launch times, countdowns, published windows, mission details, rockets, providers, and launch pads. Check available launch weather and viewing summaries. Launch cards flag when a launch's timing can light up a twilight jellyfish plume, as likely or possible. Your View provides location-based viewing context for U.S. App Store users when data is available. On iPhone, enable free T-10 reminders for eligible countdown-ready launches when notifications are enabled. BUILT TO KEEP UP WITH LAUNCH DAY Launch plans change. T-Minus Zero checks eligible missions more frequently near liftoff to keep up with new times and status updates. MAKE LAUNCH DAY YOURS WITH PREMIUM Premium brings your launch day into focus: • Your AR launch guide: AR Pad points toward the launch area for eligible missions. • Deeper viewing insight: explore more weather and viewing interpretation when available. • Alerts your way: follow missions, providers, rockets, pads, or launch sites. Customize reminders, supported timing and status alerts, and quiet hours. • Countdown at a glance: keep eligible countdowns close with Live Activities and Dynamic Island, and add Home Screen and Lock Screen widgets on supported iPhones. • Make it yours: color the app with a solid color, a gradient, Spectrum, or your own hue, from Soft to Neon. Widgets and the Live Countdown follow; launch status colors never change. • More ways to plan: review launch changes since your last visit, and use calendar and feed tools. ON IPHONE DUO Keep the countdown on the cover display, then open iPhone Duo to spread Today and launch details across the inner display. ON APPLE WATCH Check your selected launch, follow its countdown, see available viewing outlook, and add launch complications to your watch face. Setup requires a paired iPhone. Viewing outlooks are available for U.S. App Store users. Some features require Premium. Launch schedules, weather, viewing guidance, and notifications are planning aids and can change. Viewing tools and alerts vary by mission, device, and settings. Notifications are delivered on a best-effort basis. T-Minus Zero is independent and is not affiliated with or endorsed by launch providers, agencies, or data sources. Premium subscriptions renew automatically unless canceled at least 24 hours before the end of the current billing period. Available plans, offers, and prices are shown before purchase and may vary by region. Manage or cancel subscriptions in App Store settings. Lifetime Premium, where offered, is a separate one-time purchase and does not renew. It does not cancel an existing subscription. Privacy Policy: https://www.tminuszero.app/legal/privacy Terms of Service: https://www.tminuszero.app/legal/terms License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: https://www.tminuszero.app/support
Screenshots
Verdict
The clearest difference is review sentiment: T at 100% against SunGraph's 57%. T also leads on rating (5.0 vs 3.2) and update cadence (every 5 days vs every 4 months). SunGraph's advantage is in-app purchases (none vs 5) and ratings volume (14 vs 2). On price, ads 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. T sells 5 in-app purchases, starting at $3.99 per month. SunGraph asks for nothing beyond the download.
T holds the better App Store score, 5.0 against 3.2. That said, the two scores are not equally well evidenced: SunGraph has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 57% of SunGraph's written reviews are positive against 100% of T's.
SunGraph ships an update every 4 months, T every 5 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | SunGraph | T |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (14 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 56.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 14 — better | 2 |
| Update frequency | Every 4 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, Apple Watch |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 11 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Tremont Air, LLC | T-MINUS ZERO LLC |
Customer experience
SunGraph
T
In-app purchases
SunGraph
No in-app purchases
T
- Individual Monthly14 Days trial$3.991 Month
- Family Monthly14 Days trial$5.991 Month
- Individual Annual14 Days trial$39.991 Year
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- Family Annual14 Days trial$59.991 Year
- Lifetime Premium$149.99








