Comparison

Stop Calling vs CTU

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

Head to head
About

Stop Calling

Identify unknown callers and protect yourself from fraudulent or annoying calls. See descriptions of incoming calls, such as "Financial Services" or "Telemarketing," directly on your screen. The database of suspicious numbers is constantly updated.

Highlights
  • Caller identification
  • Spam call blocking
  • Real-time call descriptions
  • Updated database of suspicious numbers
  • Protection from fraudulent calls
Features
Read full description

Are you getting calls from unknown numbers? Do you wonder whether to pick up because you don't know if they might be fraudulent or harassing? This app will help you with that and protect you from unwanted calls. If one of these numbers calls you, you will see on your phone's display, in addition to the unknown number, a description of it, such as "Financial Services" or "Telemarketing." We continuously update the list of fraudulent and harassing numbers. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

CTU

Measure your mobile internet connection's upload and download speed, and ping. This app displays your current connection type and IP address, offering basic and loop measurement modes. Results are saved and accessible on the CTU website.

Highlights
  • Measure upload/download speed
  • Measure ping
  • Display connection type
  • Display IP address
  • Basic measurement mode
  • Loop measurement mode
  • Save and view results online
Features
Read full description

The CTU-NetTest mobile application of the Czech Telecommunication Office serves to measure the basic parameters (upload and download speed, ping) of mobile Internet connection. It informs users about the current QoS of the Internet access service. After opening the application, information on the current state of connection will display – the Internet access type used (Wi-Fi of mobile data), device assigned IP address etc. The measurement could be executed by two scenarios – basic measurement and loop mode. Pushing the Start button launches the selected measurement scenario. The measurement scenario consists from initialization, ping test, download speed and upload speed measurement. The measurement process is depicted graphically. After finishing the measurement, the aggregated results are displayed and saved on CTU website where the user can view them through the application and/or download as PDF anytime. The measurement results are available after anonymisation as open data on URL https://nettest.ctu.gov.cz/en/Opentests. For detailed description of the application’s use and more information, visit URL https://nettest.ctu.gov.cz/en/Apps, source code is available on https://github.com/CTUCZ/nettest-rmbt-ios. The application is rooted in RTR-NetzTest project available on URL https://github.com/rtr-nettest/open-rmbt-android.

Screenshots

Stop Calling4 screens
CTU4 screens

Verdict

The call

The clearest difference is rating: Stop Calling at 4.7 against CTU's 3.0. Stop Calling also leads on review sentiment (38% vs 0%) and update cadence (every 6 days vs every 40 months). CTU's advantage is in-app purchases (none vs 2). 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. Stop Calling sells 2 in-app purchases, starting at $0.99 per month. CTU asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Stop Calling holds the better App Store score, 4.7 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews point the same way: 38% of Stop Calling's written reviews are positive against 0% of CTU's.

UpkeepUpdate frequency

Stop Calling ships an update every 6 days, CTU every 40 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Stop Calling versus CTU: the parameters behind the verdict, then further details
ParameterStop CallingCTU
PriceFreeFree
Rating4.7 (3 ratings) — better3.0 (1 ratings)
Positive reviews38.0% of reviews — better0.0% of reviews
Number of ratings3 — better1
Update frequencyEvery 6 days — betterEvery 40 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS17.617.0 — better
Further details — not scored
Size13 MB16 MB
Age rating4+4+
DeveloperMiroslav BaudysČeský telekomunikační úřad

Customer experience

Stop Calling

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews50 reviews
Positive38.0%
Neutral12.0%
Negative50.0%

CTU

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

In-app purchases

2 purchases

Stop Calling

Subscriptions1
  • Buy me a coffee every month$0.991 Month
One-time1
  • Buy me a coffee$1.99
None

CTU

No in-app purchases

Questions

Is Stop Calling free?
Stop Calling is free to download, with in-app purchases available.
Is CTU free?
CTU is free to download, with no in-app purchases.
Which has better reviews, Stop Calling or CTU?
Stop Calling is rated higher. Stop Calling averages 4.7 out of 5 from 3 ratings, while CTU averages 3.0 from 1 ratings.
Do Stop Calling or CTU have ads?
Neither Stop Calling nor CTU shows ads.
Which is updated more often, Stop Calling or CTU?
Stop Calling ships an update every 6 days, and CTU every 40 months. Most recently, Stop Calling was updated on November 2, 2026 and CTU on November 3, 2026.

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