# 小灵龙App vs rtl_tcp SDR

The clearest difference is price: 小灵龙App at Free against rtl_tcp SDR's $12.99. 小灵龙App also leads on update cadence (monthly vs every 4 months) and iOS requirement (9.0 vs 16.6). rtl_tcp SDR's advantage is rating (3.9 vs 1.0) and ads (none vs shown). On review sentiment, ratings volume, in-app purchases and device support there is nothing between them.

小灵龙App is free to download; rtl_tcp SDR costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

rtl_tcp SDR holds the better App Store score, 3.9 against 1.0. Both are backed by a comparable volume of ratings — 12 and 32 respectively. Written reviews point the same way: 33% of 小灵龙App's written reviews are positive against 40% of rtl_tcp SDR's.

小灵龙App ships an update monthly, rtl_tcp SDR every 4 months. The most recent releases landed on September 22, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | 小灵龙App | rtl_tcp SDR |
| --- | --- | --- |
| Price | **Free** | $12.99 |
| Rating | [1.0 (12 ratings)](https://appshunter.io/ios/app/app/id1221738240/reviews) | **[3.9 (32 ratings)](https://appshunter.io/ios/app/rtl-tcp-sdr/id1351164646/reviews)** |
| Number of ratings | 12 | **32** |
| Positive reviews | 33.3% of reviews | **40.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#197** |
| Size | 157 MB | 3 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [北京新中新诚通信息技术股份有限公司](https://appshunter.io/developer/736575065) | [HotPaw Productions](https://appshunter.io/developer/285074853) |

## What reviewers say

### 小灵龙App

[App page](https://appshunter.io/ios/app/app/id1221738240)

This app provides comprehensive mobile services for campus cards, including traditional card functions like consumption and authentication, enhanced with QR code capabilities. It offers features for managing your campus card, paying various campus fees, and booking campus facilities.

**Highlights:** Campus card management, QR code functionality, Campus fee payments, Facility booking, Card application and registration

**In-app purchases:** none


### rtl_tcp SDR

[App page](https://appshunter.io/ios/app/rtl-tcp-sdr/id1351164646)

**Currently charting:** #197 Top Paid · Utilities (US App Store)

This app acts as a software-defined radio receiver for iOS devices, allowing you to listen to various radio signals and view RF spectrum data. It connects to external SDR peripherals via a network protocol, requiring a separate server setup.

**Highlights:** Listen to AM, FM, SSB, CW signals, View RF spectrum and waterfall, Connect to networked RTL-SDR peripherals, Supports Airspy HF+, SDRPlay, LimeSDR Mini, Direct connection to Hermes Lite 2

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 小灵龙App free?

小灵龙App is free to download, with no in-app purchases.

### Is rtl_tcp SDR free?

rtl_tcp SDR costs $12.99, with no in-app purchases.

### Which has better reviews, 小灵龙App or rtl_tcp SDR?

rtl_tcp SDR is rated higher. 小灵龙App averages 1.0 out of 5 from 12 ratings, while rtl_tcp SDR averages 3.9 from 32 ratings.

### Do 小灵龙App or rtl_tcp SDR have ads?

小灵龙App shows ads; rtl_tcp SDR does not.

### Which is updated more often, 小灵龙App or rtl_tcp SDR?

小灵龙App ships an update monthly, and rtl_tcp SDR every 4 months. Most recently, 小灵龙App was updated on September 22, 2026 and rtl_tcp SDR on September 16, 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.*