# SatVis vs WANJIN ESS

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.

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.

## The numbers

| Metric | SatVis | WANJIN ESS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 88 months | **Every 6 months** |
| Monetization | Free | — |
| Size | 5 MB | 24 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Florian Mauracher](https://appshunter.io/developer/1438364622) | [Anhui Udan Technology Co., Ltd.](https://appshunter.io/developer/1593792520) |

## What reviewers say

### SatVis

[App page](https://appshunter.io/ios/app/satvis/id1441084766)

Visualize satellite orbits and predict upcoming passes. Receive notifications for when satellites will be visible from your location. Access a comprehensive satellite tracking experience.

**Highlights:** Satellite orbit visualization, Pass prediction, Upcoming pass notifications, Wrapper for satvis.space

**Features:** Vision Pro support

**In-app purchases:** none


### WANJIN ESS

[App page](https://appshunter.io/ios/app/wanjin-ess/id6478657145)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SatVis free?

SatVis is free to download, with no in-app purchases.

### Is WANJIN ESS free?

WANJIN ESS is free to download, with no in-app purchases.

### Do SatVis or WANJIN ESS have ads?

Neither SatVis nor WANJIN ESS shows ads.

### Which is updated more often, SatVis or WANJIN ESS?

SatVis ships an update every 88 months, and WANJIN ESS every 6 months. Most recently, SatVis was updated on October 16, 2026 and WANJIN ESS on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*