Comparison

RTR vs ShareByLight File Transfer

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

Head to head
About

RTR

Measure your internet connection's speed, ping, and signal strength. It also tests quality parameters like VoIP and web page loading. View results on a map and analyze historical data.

Highlights
  • Internet speed testing (upload, download, ping)
  • Quality parameter testing (VoIP, web page)
  • Signal strength measurement
  • Map view of test results
  • Historical data analysis
  • Automatic test repetition (loop mode)
Features
Read full description

In addition to the speed of your current Internet connection (upload, download, ping, signal strength) the RTR-NetTest (in German: RTR-Netztest) also measures a number of quality parameters (VoIP, unmodified content, web page, transparent connection, DNS, ports). The RTR-NetTest was developed by the Austrian telecom-regulator, the Regulatory Authority for Broadcasting and Telecommunications (RTR). The source code of the app is available as open source at https://github.com/rtr-nettest/open-rmbt-ios . The start page provides information about the cellular or WLAN connection. The RTR-NetTest is carried out by pressing the "START" button. If the loop mode has been activated, the "LOOP" button will appear instead of the “START” button. The loop mode enables the RTR-NetTest to be repeated automatically. The tests will start as soon as the waiting time has elapsed or the specified distance has been covered. The results of the RTR-NetTests are available as Open Data (https://www.netztest.at/en/Opendata ) and are shown in the map view as heatmap or as coloured dots. In addition, there are additional options to filter the results according to various criteria. You can tap each measuring point for more details. The RTR-NetTest app includes: · the possibility to retrieve one’s own test results and to synchronize the results of different end devices and to display them in the browser ("history") · a map view of all test results with filter options by measurement parameters, statistics, Internet providers, end device and period of time (“map”) · the option to repeat tests automatically (loop mode) · the display of the five most recent tests, statistics on the results of the Internet providers and all end devices / browsers used with filter options by quantile, measurement parameters and measurement period ("statistics") · quality parameters (e.g. signal strength, connectivity on different ports, changes in data transmission, transmission time for a reference website) · a traffic light assessment of the measurement results detailed FAQ list is available at https://www.netztest.at/redirect/de/help

About

ShareByLight File Transfer

Features
Read full description

ShareByLight moves files from one device to another using only the screen and camera. What it’s for • Pass a file when you don’t want (or can’t use) Wi-Fi or Bluetooth, between air gapped devices • Share between iPhone, iPad, and Mac without a network • Keep the transfer offline and local to the devices in front of you How it works 1. On one device, choose a file and start the stream 2. On the other device, open Receive and point the camera at the screen 3. When the transfer finishes, save the file Features • Send and receive on the same app • Works across iPhone, iPad, and Mac • Optional password protection for the file • Clear progress while the transfer runs • Free: one direction and small files • Pro: both directions and larger files Tips for a smooth transfer • Max brightness on the sending screen • Hold steady and fill the frame • Reduce glare and strong backlight No account required. No cloud. Data moves as light between the devices you choose.

Screenshots

RTR4 screens
ShareByLight File Transfer3 screens

Verdict

The call

The clearest difference is in-app purchases: RTR at none against ShareByLight File Transfer's 1. ShareByLight File Transfer's advantage is update cadence (every 2 weeks vs every 6 weeks). On price, ads, device support and iOS requirement 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

Both are free to download. ShareByLight File Transfer sells 1 one-off in-app purchase. RTR asks for nothing beyond the download.

UpkeepUpdate frequency

RTR ships an update every 6 weeks, ShareByLight File Transfer every 2 weeks. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 8 level
RTR versus ShareByLight File Transfer: the parameters behind the verdict, then further details
ParameterRTRShareByLight File Transfer
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews60.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 6 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size15 MB5 MB
Age rating4+4+
DeveloperRTR-GmbHDragos Roua

In-app purchases

None

RTR

No in-app purchases

1 purchases

ShareByLight File Transfer

One-time1
  • ShareByLight Pro$5.99

Questions

Is RTR free?
RTR is free to download, with no in-app purchases.
Is ShareByLight File Transfer free?
ShareByLight File Transfer is free to download, with in-app purchases available.
Do RTR or ShareByLight File Transfer have ads?
Neither RTR nor ShareByLight File Transfer shows ads.
Which is updated more often, RTR or ShareByLight File Transfer?
RTR ships an update every 6 weeks, and ShareByLight File Transfer every 2 weeks. Most recently, RTR was updated on October 24, 2026 and ShareByLight File Transfer on October 10, 2026.

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