# ZinModulator ISDB vs HamSat

The clearest difference is in-app purchases: ZinModulator ISDB at none against HamSat's 1. ZinModulator ISDB also leads on iOS requirement (17 vs 26.4). HamSat's advantage is device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. HamSat sells 1 one-off in-app purchase. ZinModulator ISDB asks for nothing beyond the download.

## The numbers

| Metric | ZinModulator ISDB | HamSat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (6 ratings)](https://appshunter.io/ios/app/hamsat-ham-satellite-tracker/id6762450814/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 days |
| Monetization | — | Free with in-app purchases |
| Size | 26 MB | 11 MB |
| Requires iOS | **17** | 26.4 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [ZINWELL CORPORATION](https://appshunter.io/developer/1019370251) | [Vasco Barreiros](https://appshunter.io/developer/1451715392) |

## What reviewers say

### ZinModulator ISDB

[App page](https://appshunter.io/ios/app/zinmodulator-isdb-t/id6743151595)

**Features:** macOS Compatibility

**In-app purchases:** none


### HamSat

[App page](https://appshunter.io/ios/app/hamsat-ham-satellite-tracker/id6762450814)

Track satellite passes with real-time azimuth, elevation, and Doppler-corrected frequencies. Features an Apple Watch companion for wrist-based aiming and pass tracking, and allows users to stamp photos with operational data.

**Highlights:** Apple Watch companion for pass tracking and antenna aiming, Live sky dome with real-time satellite arcs, Aim mode with phone compass and haptic feedback, Doppler-corrected frequencies for operating during passes, Photo stamping with callsign, grid, satellite, and UTC time, Offline satellite tracking and propagation, Geostationary satellite tracking

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HamSat Pro | $9.99 | one-time |


## Frequently asked questions

### Is ZinModulator ISDB free?

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

### Is HamSat free?

HamSat is free to download, with in-app purchases available.

### Do ZinModulator ISDB or HamSat have ads?

Neither ZinModulator ISDB nor HamSat shows ads.

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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.*