Comparison

Gradient Image Generator vs CoronaSDR

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Gradient Image Generator

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
Read full description

Gradient Image Generator generate 3 types of gradient image. CSS3 Codes, SVG Codes and Images. with instant previewing so you get exactly what you had in mind. Generate a linear gradient and save it as an image, css code or sag code. You can set the dimensions for the image, the colors, the orientation and the zoom of the gradient. Features: - Able to set number of colours from 2 to 12 - Able to set custom colour for each node - Able to set colour node position - Able to set Gradient orientation such as horizontal, vertical, 30°, 45° or custom angle - Able to set image size range from 5 to 8000 pixels in rectangular shape - Lightweight app with a small size, optimized for everyday use Saving options: - Save generate Gradient Image to camera roll - Copy generate CSS 3 Code into clipboard and paste into any html app you desire - Copy generate SVG Code into clipboard and paste into any app you desire Gradient images are used everywhere in web page design, background design. Eg, it can be use as the background buttons, html table, DIVs, to act as shadows and other interesting visual effects etc. In computer graphics, a color gradient specifies a range of position-dependent colors, usually used to fill a region. For example, many window managers allow the screen background to be specified as a gradient. The colors produced by a gradient vary continuously with position, producing smooth color transitions. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

About

CoronaSDR

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
Read full description

CoronaSDR is an iOS app for listening to rtl_tcp SDR servers over your local network. Key features: - Live spectrum and waterfall rendering - Demodulation modes: AM, NFM, WFM, USB, LSB, CW - DSP controls: squelch, AGC, audio filters, de-emphasis - Station favorites with import/export - RF controls such as PPM and tuner options (hardware/server dependent) - Diagnostics and a performance-focused pipeline No account is required. Set your rtl_tcp host and port, connect, and tune. Built by Silviu YO6SAY for the radio community.

Screenshots

Gradient Image Generator4 screens
CoronaSDR3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Gradient Image Generator versus CoronaSDR: the parameters behind the verdict, then further details
ParameterGradient Image GeneratorCoronaSDR
Price$2.99Free — better
Rating4.7 (3 ratings)5.0 (5 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings35 — better
Update frequencyEvery 40 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13 — better18.0
Further details — not scored
Size2 MB5 MB
Age rating4+4+
DeveloperNitrioAlien Systems S.R.L.

Customer experience

Gradient Image Generator

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

CoronaSDR

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Gradient Image Generator

No in-app purchases

None

CoronaSDR

No in-app purchases

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.

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