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Truecaller VS DevPrep.app

Compare Truecaller VS DevPrep.app and see what are their differences

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Create production-ready applications with zero code featured
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.
Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

Truecaller logo Truecaller

Find a person by a name or phone number worldwide for free using Truecaller.

DevPrep.app logo DevPrep.app

Two-way AI voice interview practice for developers and devops
  • Truecaller Landing page
    Landing page //
    2023-08-01
  • DevPrep.app Landing page
    Landing page //
    2026-07-14
  • DevPrep.app Flashcards
    Flashcards //
    2026-07-14
  • DevPrep.app Categories
    Categories //
    2026-07-14
  • DevPrep.app Interview Question
    Interview Question //
    2026-07-18

DevPrep.app is a two-way AI voice interview simulator for developers. Unlike other interview prep tools where you type your answers, DevPrep.app actually talks back the AI asks you a technical question out loud, listens to your spoken answer, gives feedback, and asks follow-up questions just like a real interviewer would. Also includes 500+ flashcards across Azure, C#, React, TypeScript, Docker, Kubernetes, Python, SQL, Terraform and more, with progress tracking and review mode. Free tier available. Works in your browser no app install needed.

Truecaller

Website
truecaller.com
$ Details
-
Platforms
-
Release Date
2009 January
Startup details
Country
Sweden
State
Stockholms Lan
City
Stockholm
Founder(s)
Alan Mamedi
Employees
50 - 99
Edit details

DevPrep.app

Website
devprep.app
$ Details
freemium ยฃ7.99 / Monthly (All cards, progress tracking, 20 desktop & 5 mobile interviews)
Platforms
Web Mobile
Release Date
2026 July
Startup details
Country
United Kingdom
Edit details

Truecaller features and specs

  • Caller Identification
    Truecaller identifies unknown numbers and displays the caller's information based on a large database, helping users avoid spam or unwanted calls.
  • Spam Detection
    The app blocks spam calls and messages, reducing the inconvenience of dealing with telemarketers and scammers.
  • Call and SMS Filtering
    Truecaller offers filtering options for both calls and SMS, allowing users to manage and prioritize their communications effectively.
  • User-Generated Database
    The database is updated by user contributions, which means it continuously improves and includes a wide variety of numbers from around the world.
  • Additional Features
    Truecaller includes additional features such as call recording, flash messaging, and contact backup, adding extra value to the user experience.

Possible disadvantages of Truecaller

  • Privacy Concerns
    The app requires access to the user's contacts, which raises privacy issues as this data is uploaded to Truecaller's database.
  • Data Usage
    Constantly updating the database and identifying calls can consume a significant amount of mobile data.
  • Battery Drain
    Running in the background to monitor and block calls can lead to additional battery consumption.
  • False Positives
    Occasionally, legitimate calls may be mistakenly identified as spam, which can lead to missed important calls.
  • In-App Advertisements
    The free version of the app includes advertisements, which can be intrusive and detract from the user experience.

DevPrep.app features and specs

  • Two-way AI Voice Interview
    AI asks questions out loud, listens to your spoken answers and asks follow-up questions like a real interviewer
  • Name: 500+ Flashcards
    Description: Covers Azure, C#, React, TypeScript, Docker, Kubernetes, Python, SQL, Terraform and more
  • Progress Tracking
    Track your confidence scores across sessions and review cards you struggled with

Analysis of Truecaller

Overall verdict

  • Truecaller is generally considered a good service for users seeking to avoid spam calls and improve their call management. However, some privacy concerns have been raised, as the app requires access to contacts and other personal information to function effectively.

Why this product is good

  • Truecaller is widely regarded as a useful tool for managing incoming calls and identifying unknown numbers. It helps in filtering spam calls and messages, provides information about unknown phone numbers, and offers features such as call recording and contact management. Its large user base contributes to a comprehensive database, enhancing its effectiveness in identifying potential spam and fraudulent calls.

Recommended for

    Truecaller is recommended for individuals who receive a high volume of spam or unknown calls, professionals who need efficient call management, and those who prioritize the identification of incoming call sources. Users who are comfortable sharing their contact information with the app to leverage its full functionality may find it particularly beneficial.

Analysis of DevPrep.app

Overall verdict

  • DevPrep.app appears to be a niche coding/technical interview preparation tool, but I don't have verified, up-to-date information confirming its current quality, content accuracy, or user satisfaction, so I can't give a confident endorsement.

Why this product is good

  • Positioned as a focused resource for developers preparing for technical interviews
  • May offer structured practice problems or study plans
  • Likely targets a specific pain point (interview prep) rather than being a general-purpose tool
  • Web-based apps like this often have low barriers to trying them out

Recommended for

  • Software engineers preparing for coding interviews
  • Job seekers wanting a structured practice routine
  • Developers looking for a lightweight, focused prep tool rather than a full bootcamp
  • Users who prefer trying a specific niche tool before committing to larger platforms

Truecaller videos

+ Add

Truecaller | App Review

More videos:

  • Review - Is TrueCaller Worth it? | iOS Android | IRS Spammer | App Review
  • Review - How TrueCaller Works? Crowd Sourcing?

DevPrep.app videos

No DevPrep.app videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Truecaller and DevPrep.app)

Truecaller

DevPrep.app

Call Management
100 100%
Call Management
0% 0
Education
0 0%
Education
100% 100
Caller ID
100 100%
Caller ID
0% 0
Developer Tools
0 0%
Developer Tools
100% 100

Questions & Answers

As answered by people managing Truecaller and DevPrep.app.

How would you describe the primary audience of your product?

DevPrep.app's answer:

Software developers and DevOps engineers who are preparing for technical interviews.

What makes your product unique?

DevPrep.app's answer:

DevPrep.app offers a genuine two-way voice conversation for interview practice. The AI asks questions out loud, evaluates your spoken response, gives feedback, and asks follow-up questions just like a real technical interviewer would. Most tools make you type. Real interviews make you talk. DevPrep.app also includes 500+ flashcards across 15 topics with progress tracking and review mode, all working in your browser with no app install needed.

Why should a person choose your product over its competitors?

DevPrep.app's answer:

Most interview prep tools train you to write answers, not speak them. DevPrep.app trains the skill that actually matters in interviews โ€” communicating clearly under pressure. It works in your browser with no app install, supports both desktop and mobile voice interviews, and includes 500+ flashcards with progress tracking across 15 topics.

What's the story behind your product?

DevPrep.app's answer:

Built by a developer who noticed that knowing the answers and being able to say them confidently out loud are completely different skills. Most prep tools only train one of them. DevPrep.app was built to train both.

Which are the primary technologies used for building your product?

DevPrep.app's answer:

ASP.NET Core 7, React, TypeScript, Azure OpenAI (GPT-4o), Azure Cognitive Services Speech SDK, Web Speech API, Azure Container Apps, Azure Static Web Apps, Stripe, SQL Server

User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare Truecaller and DevPrep.app

Truecaller Reviews

9 Best Truecaller Alternatives โ€“ 2022
Apart from Truecaller collects way too much data about the users and the security they offer isnโ€™t really top notch. Therefore, here are the 9 best TrueCaller alternatives.
Source: www.techmediatoday.com
Top 10 Truecaller Alternatives You Can Use
When Truecaller launched, it was one of the first apps to bring universal caller ID services to smartphones, and I loved using the service. However, over the years Truecaller has become too bloated. The app is one of the biggest culprits behind background battery drainage in a smartphone. I also donโ€™t like the fact that the service collects too much data about my calls and...
Source: beebom.com
10 Best Truecaller Alternatives For Android in 2022
There are plenty of caller ID and call blocker apps available for Android smartphones. However, if I had to pick anyone, I would choose the TrueCaller app. TrueCaller is one of the best caller ID and call blocker apps available for Android smartphones on the Play Store.
Source: techviral.net

DevPrep.app Reviews

We have no reviews of DevPrep.app yet.
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Social recommendations and mentions

Based on our record, Truecaller seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Truecaller mentions (2)

  • Is there a service I can buy or something to do about solicitor calls
    Unfortunately, looks like every truecaller bot's been suspended. But you can always just use truecaller.com, their actual site. it's a bit tedious, but works just fine and a loot less annoying than spam calls. Source: about 3 years ago
  • This is a new one for me. I just received 3 spam calls one after the other.
    It would be awesome if you guys could install and the report these numbers on ScamShield [https://scamshield.org.sg]. Sadly iOS only for now. Alternatively I also use TrueCaller on Android [https://truecaller.com]. Normally I pick up the calls and let the recordings play until they auto hang up around 58-59s (probably get billed after that or something). Now the calls I get are all under 30s and yes I also saw a... Source: about 4 years ago

DevPrep.app mentions (0)

We have not tracked any mentions of DevPrep.app yet. Tracking of DevPrep.app recommendations started around Jul 2026.

What are some alternatives?

When comparing Truecaller and DevPrep.app, you can also consider the following products

CallApp - Free Caller ID & Call Blocker app that allows mobile users to block phone calls, identify calls, blacklist unwanted callers and much more.

interviewing.io - Free, anonymous technical interview practice

Hiya - Know who's calling or texting and block spammers on Android

Interview Cake - Free practice programming interview questions. Interview Cake helps you prep for interviews to land offers at companies like Google and Facebook.

WhosCall - WhosCall is a reliable caller ID app whose popularity has led to its adoption by many users including international media. You can now manage the numbers calling you regardless of whether they are part of your contact list or not... read more.

CallerSmart - CallerSmart is an application that is basically used for the purpose of looking up mystery phone numbers for free.

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