Seestar vs SunSketcher
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Seestar
Explore the universe with a smart telescope that simplifies stargazing. Automatically find, focus, and capture celestial objects without professional guidance. Observe stars, the sun, and even landscapes with intuitive app control.
- Wireless control of telescope
- Automatic celestial object finding and tracking
- Solar observation with filter
- Scenery mode for terrestrial viewing
- Built-in sky atlas and encyclopedia
- Stargazing index and recommendations
- Share observations with community
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Take the first step in exploring the universe! The Seestar smart telescope will give you a stargazing experience like never before. No need for professional guidance, just tap on the screen and you are ready to observe and capture the stars. Seestar is a smart device that integrates the functions of an altazimuth mount, telescope, and camera, with both hardware and software applications. With the Seestar App, you can easily control this multifunctional device and explore the infinite world of stars. Key features: - Wireless control: Control with Seestar device through wireless connection. - Stargazing Mode: Automatically find and focus on celestial objects, intelligently identify stars and track them for automatic capturing and image processing. - Solar Mode: Support auto-scan and solar tracking. Use the included Solar Filter to observe the unique sun. - Scenery mode: Manually control the telescope direction and auto-focus, so you can enjoy observing birds and landscapes. -Sky Atlas: Built-in curated celestial object database AND a rich astronomical knowledge encyclopedia,help you easily understand the mystery of starry sky. - Stargazing Index forecasts and popular Recommendations: Stay updated with popular information, making you an expert in astronomical events. - Share Your Work in the Square: Engage and exchange insights with astronomy enthusiasts from around the world, showcasing your observational achievements. - Adaptation Model: It will work with all Seestar models. Seestar is your ideal companion for exploring the universe, observing the stars and sharing experiences. Download Seestar App now and Explore the universe with Seestar.
SunSketcher
Capture crucial data during the Great North American Eclipse. This app automatically takes photos of the sun, helping scientists create a precise model of its shape and study solar interior flows. Participate in citizen science from your smartphone.
- Automatic eclipse photography
- Location-based timing for totality
- Data upload for scientific analysis
- Citizen science participation
- Contributes to heliophysics research
- No special equipment needed
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SunSketcher is a citizen science initiative anyone can use to photograph the April 8th, 2024 Great North American Eclipse. Mass participation will generate an incredible database of images that, when analyzed together, could allow scientists to more accurately model the Sun. "We don't know the shape of the Sun?" you ask. Nope. Well, not exactly. Scientists have a pretty good idea, but it's not nearly as precise as it could be. Our hope is to change that—to measure the Sun's oblateness to an accuracy of a few parts in a million! This app uses your location to determine the time that totality will start and end there. This allows it to automatically take photos chock-full of data of the eclipse while you don't have to worry about the precise details! After totality, you can choose to upload the photos that were taken, along with a few other details about your location at the time of the eclipse and what settings your phone's camera was using, to our data servers for scientific analysis. What is citizen science? Citizen science is a collaborative style of research involving volunteers from the general public. The contributions of these “citizen scientists” help researchers collect and analyze large datasets. Citizenship is NOT a requirement. How will this project contribute to heliophysics research? We are aiming to create the first large-scale database of Baily's Bead images, which will allow the Sun’s shape to be precisely determined to within a few parts per million. Just as the precise shape of the Earth’s ocean surface allows us to determine flows inside the Earth, the SunSketcher database will allow us to study flows in the solar interior. In addition, knowing the precise shape of the Sun will allow physicists to test against and possibly disprove different theories of gravity, including General Relativity! Are there requirements or qualifications needed to participate? Can I participate if I’m not a scientist? You do not need to be a scientist to participate. Our aim is to involve as large and diverse a group of SunSketchers as possible. Why should I participate in SunSketcher? The unique aspect of SunSketcher is that everyone with a phone can make a valuable contribution to a state-of-the-art science project. No special equipment is required, just a smartphone. And, if you register as a SunSketcher on our site, we will add your name to the list of contributors. You might even get mentioned as a Guinness World Record Holder! Where do I have to be on the eclipse day? Anywhere inside the path of totality. Will I be able to watch the eclipse at the same time that I'm using SunSketcher? YES!! In fact, we encourage you to view the eclipse on your own (with appropriate safety precautions at appropriate times) while SunSketcher is running on your phone. The scientific quality of the images obtained will be best if the phone is left untouched throughout the few minutes between the start and end of totality. The app will be finished with the nitty-gritty science stuff just a minute or two after totality ends, at which point you can pick up and begin using your phone again.
Screenshots
Verdict
The clearest difference is rating: Seestar at 4.2 against SunSketcher's 2.6. Seestar also leads on review sentiment (62% vs 33%) and ratings volume (354 vs 23). SunSketcher's advantage is monetization model (free vs paid) and update cadence (fortnightly vs monthly). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Seestar holds the better App Store score, 4.2 against 2.6. That said, the two scores are not equally well evidenced: Seestar has 354 ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 62% of Seestar's written reviews are positive against 33% of SunSketcher's.
Seestar ships an update monthly, SunSketcher fortnightly. The most recent releases landed on October 26, 2026 and October 3, 2026 respectively.
| Parameter | Seestar | SunSketcher |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (354 ratings) — better | 2.6 (23 ratings) |
| Positive reviews | 62.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 354 — better | 23 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 1.3 GB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | SuZhou ZWO Co., Ltd | Western Kentucky University |
Customer experience
Seestar
SunSketcher
Bugs and requests
Seestar
Reported bugs
5 issues- Firmware update cycle preventing settings changes
- Tracking errors and star trailing issues
- App crashing on startup
- Inability to connect to telescope
- Forced firmware updates during use
Requested features
5 requests- Add equatorial mode support
- Provide fine control of exposure time
- Implement mosaic mode for wider FOV
- Add support for iPad landscape mode
- Integrate with other astronomy apps
SunSketcher
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Seestar
No in-app purchases
SunSketcher
No in-app purchases








