# Gradient Image Generator vs CoronaSDR

The clearest difference is review sentiment: CoronaSDR at 100% against Gradient Image Generator's 0%. CoronaSDR also leads on price (Free vs $2.99) and update cadence (every 3 weeks vs every 40 months). Gradient Image Generator's advantage is iOS requirement (13 vs 18.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

CoronaSDR is free to download; Gradient Image Generator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CoronaSDR holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 5 respectively. Written reviews point the same way: 0% of Gradient Image Generator's written reviews are positive against 100% of CoronaSDR's.

Gradient Image Generator ships an update every 40 months, CoronaSDR every 3 weeks. The most recent releases landed on September 18, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Gradient Image Generator | CoronaSDR |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.7 (3 ratings)](https://appshunter.io/ios/app/gradient-image-generator/id1473397251/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/coronasdr-rtl-sdr-client/id6759222137/reviews)** |
| Number of ratings | 3 | **5** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 5 MB |
| Requires iOS | **13** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Alien Systems S.R.L.](https://appshunter.io/developer/1047123293) |

## What reviewers say

### Gradient Image Generator

[App page](https://appshunter.io/ios/app/gradient-image-generator/id1473397251)

Easily create custom gradient images with CSS, SVG, or image file outputs. Adjust colors, angles, dimensions, and zoom for precise visual effects. Save directly to your device or copy code for web design.

**Highlights:** Generate CSS, SVG, and image gradients, Set 2-12 custom colors and positions, Adjust gradient orientation and angle, Define image dimensions up to 8000 pixels, Instant preview for precise results, Save images or copy code to clipboard

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### CoronaSDR

[App page](https://appshunter.io/ios/app/coronasdr-rtl-sdr-client/id6759222137)

This application allows users to connect to and control RTL-SDR servers on their local network. It provides live spectrum and waterfall displays, various demodulation modes, and DSP controls for audio filtering and signal tuning. Users can save favorite stations and adjust RF settings.

**Highlights:** Live spectrum and waterfall display, Multiple demodulation modes (AM, NFM, WFM, USB, LSB, CW), DSP controls (squelch, AGC, filters), Station favorites with import/export, RF controls (PPM, tuner options), Diagnostics and performance pipeline

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Gradient Image Generator free?

Gradient Image Generator costs $2.99, with no in-app purchases.

### Is CoronaSDR free?

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

### Which has better reviews, Gradient Image Generator or CoronaSDR?

CoronaSDR is rated higher. Gradient Image Generator averages 4.7 out of 5 from 3 ratings, while CoronaSDR averages 5.0 from 5 ratings.

### Do Gradient Image Generator or CoronaSDR have ads?

Neither Gradient Image Generator nor CoronaSDR shows ads.

### Which is updated more often, Gradient Image Generator or CoronaSDR?

Gradient Image Generator ships an update every 40 months, and CoronaSDR every 3 weeks. Most recently, Gradient Image Generator was updated on September 18, 2026 and CoronaSDR on September 5, 2026.

---

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