SatVis vs WANJIN ESS
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SatVis
Visualize satellite orbits and predict upcoming passes. Receive notifications for when satellites will be visible from your location. Access a comprehensive satellite tracking experience.
- Satellite orbit visualization
- Pass prediction
- Upcoming pass notifications
- Wrapper for satvis.space
Read full descriptionHide full description
Satvis is a free, open-source satellite tracker. It draws more than 12,000 satellites on a 3D globe in real time, across fourteen catalog groups: Starlink, GPS and the other navigation constellations, weather and Earth-observation satellites, the ISS and other crewed stations. Set where you are and it works out when each one passes overhead, and your iPhone reminds you before the pass starts. Point your iPhone at the sky to find the ISS, Starlink and 12,000 more satellites overhead. WHAT IT DOES β’ Follow more than 12,000 satellites live on a 3D globe, with positions computed on your device β’ Show points, labels, orbits, ground tracks, sensor cones and 3D models, coloured by orbit class β’ Turn any of the 14 catalog groups on or off, or search for a single satellite β’ Track a satellite and the camera follows it along its orbit β’ Set a ground station, list its upcoming passes, and get a notification before one starts β’ Find a satellite overhead in the sky view, aimed by moving your phone β’ Choose 3D, 2D or Columbus view, with base maps, star fields, terrain and 3D buildings β’ Share the exact view you are looking at as a link β’ Keep using it offline from cached satellite data WHERE THE DATA COMES FROM Orbital elements come from CelesTrak, refreshed every six hours, and are propagated on your device with SGP4. FREE AND OPEN SOURCE No account, no ads, no in-app purchases. Developed in the open at github.com/Flowm/satvis under the MIT licence.
WANJIN ESS
Read full descriptionHide full description
The EMS App supports the access and unified control of energy storage, photovoltaic and charging equipment. Support different operators' access, and completely isolate the data of each operator. Flexible generation of daily, monthly, and annual operating data reports and revenue data. For end users of energy storage, it provides power generation and power consumption data viewing, optimizes energy supply, and monitors energy equipment anytime and anywhere through instant reminders and remote access functions.
Screenshots
Verdict
The clearest difference is update cadence: WANJIN ESS at every 6 months against SatVis's every 88 months. WANJIN ESS also leads on iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SatVis ships an update every 88 months, WANJIN ESS every 6 months. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.
| Parameter | SatVis | WANJIN ESS |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | β |
| Update frequency | Every 88 months | Every 6 months β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | β |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 12.0 β better |
| Further details β not scored | ||
| Size | 5 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Florian Mauracher | Anhui Udan Technology Co., Ltd. |
In-app purchases
SatVis
No in-app purchases
WANJIN ESS
No in-app purchases









