# Until Then Countdown vs CoronaSDR

The clearest difference is price: CoronaSDR at Free against Until Then Countdown's $0.99. Until Then Countdown's advantage is iOS requirement (14.0 vs 18.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

CoronaSDR is free to download; Until Then Countdown costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Until Then Countdown ships an update every 5 days, CoronaSDR every 9 days. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Until Then Countdown | CoronaSDR |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (10 ratings)](https://appshunter.io/ios/app/coronasdr-rtl-sdr-client/id6759222137/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | — | Free |
| Size | 4 MB | 5 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [James Wise](https://appshunter.io/developer/1845989858) | [Alien Systems S.R.L.](https://appshunter.io/developer/1047123293) |

## What reviewers say

### Until Then Countdown

[App page](https://appshunter.io/ios/app/until-then-countdown/id6756274678)

**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 Until Then Countdown free?

Until Then Countdown costs $0.99, with no in-app purchases.

### Is CoronaSDR free?

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

### Do Until Then Countdown or CoronaSDR have ads?

Neither Until Then Countdown nor CoronaSDR shows ads.

### Which is updated more often, Until Then Countdown or CoronaSDR?

Until Then Countdown ships an update every 5 days, and CoronaSDR every 9 days. Most recently, Until Then Countdown was updated on October 30, 2026 and CoronaSDR on October 24, 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.*