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HackerRank VS inputprobe DPI Test

Compare HackerRank VS inputprobe DPI Test and see what are their differences

HackerRank

HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.

Rating
0 reviews
Alternatives Is it good?
inputprobe DPI Test

Measure your mouse's real DPI against a physical reference, with the spread shown and the alignment error measured. Runs in your browser; nothing is uploaded.

Rating
0 reviews
Pricing
Free Free trial
Alternatives Is it good?
ScholarSail
AI study tools that generate mindmaps, spaced-repetition flashcards, and 3D memory palaces from your notes. Built-in rich text editor, Pomodoro timer, and colored noise. sponsored
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.

Which is more popular?

Based on our record, HackerRank seems to be more popular. It has been mentioned 67 times since March 2021.

social mentions
67 vs 0
Hiring And Recruitment popularity
100% vs 0%
alternatives listed
240+ vs 29

Base details

Website, pricing, platforms and company facts side by side.

HackerRank
inputprobe DPI Test
Website hackerrank.com inputprobe.com
Pricing —
Free Free trial
Listed in
Hiring And Recruitment Online Learning Online Education Skill Assessment +1
OS & Utilities Online Services Online Utilities System Utilities Utilities / Web Tools Web Utilities Utilities Monitoring Tools Tool Development Mouse Tools Testing +9

About HackerRank and inputprobe DPI Test

In their own words, as submitted to SaaSHub.

HackerRank
inputprobe DPI Test

No description of HackerRank yet.

A browser can't ask a mouse for its DPI, so this test measures it: drag along an object whose size is fixed by international standard (a bankcard is 85.60 mm by ISO/IEC 7810), three passes, median plus spread. Accuracy bands are published from 51 runs on real hardware, and an alignment check...

Read more about inputprobe DPI Test

Features and specs

What each product offers, as listed by its team.

HackerRank 7 features
inputprobe DPI Test 5 features
  • Skill Assessment
    HackerRank provides a structured way to assess coding skills through a wide range of programming challenges and problems.
  • Wide Range of Languages
    Supports numerous programming languages, making it versatile for users with different preferences and expertise.
  • Interview Preparation
    Offers various interview preparation kits and company-specific challenges to help candidates prepare for job interviews.
  • Community and Collaboration
    A community of coders where users can discuss problems, share solutions, and collaborate on coding projects.
  • Company Recruitments
    Many companies use HackerRank for recruitment, and performing well on the platform can lead to job opportunities.
  • Leaderboard and Gamification
    Features like leaderboards and gamification elements motivate users to improve their rankings and skills continuously.
  • Educational Resources
    Provides tutorials and explanations that help users understand algorithms and data structures better.

Possible disadvantages

  • Steep Learning Curve
    Beginners may find some problems too challenging, which can be discouraging if they lack foundational knowledge.
  • Potential Focus on Competitive Programming
    The platform may emphasize competitive programming skills, which are not always directly applicable to all real-world software development scenarios.
  • Quality Variance in Problems
    The quality and difficulty of problems can vary, which may affect the consistency of the learning experience.
  • Limited Real-World Project Experience
    The focus on algorithms and coding challenges means there's less emphasis on full-scale project development experience.
  • Limited Feedback
    Automated grading provides limited feedback, which may not be enough for users to understand their mistakes fully.
  • Subscription Costs
    Access to some premium content and features requires a subscription, which may not be affordable for all users.
  • Network Dependency
    Requires a good internet connection to participate in coding challenges and access resources, which may be a limitation for some users.
  • Measures, does not guess
    A browser cannot ask a mouse for its DPI, so this measures it: you drag the mouse along a reference object of known size and it counts the movement the mouse actually reports over that distance.
  • Standard physical references
    Measure against a bank card, whose long edge is 85.60 mm by ISO/IEC 7810, or A4 or US Letter paper at 297 mm and 279.4 mm. The reference is an international standard, so no ruler is involved.
  • Three passes, median and spread
    You get the median of three passes plus the spread between them. Passes landing within a percent or two mean the measurement was repeatable; a wide spread means something interfered, and the tool says so.
  • Refuses rather than guesses
    When the three passes disagree, no DPI figure is reported. An honest refusal is more useful than a confident wrong number, and the page explains what to change before trying again.
  • Free, local, nothing uploaded
    Free and runs entirely in your browser. No account, no signup, no install, and nothing about the measurement leaves your machine.

Analysis

An editorial look at what each product does well and who it suits.

HackerRank
inputprobe DPI Test

Overall verdict

  • Yes, HackerRank is generally considered a good platform for improving coding skills and preparing for technical interviews. It is widely used by developers to hone their coding abilities and by companies to assess candidates' coding proficiency.

Why this product is good

  • HackerRank is a popular platform for coding enthusiasts, offering a wide range of programming challenges and competitions. It stands out for its extensive problem library, which is beneficial for practice and learning. The platform supports multiple programming languages and provides detailed feedback on submissions, making it a valuable tool for both beginners and experienced programmers.

Recommended for

    HackerRank is recommended for students, individual learners, and job seekers looking to improve their coding skills, as well as for companies seeking an efficient way to evaluate candidates' technical abilities during the hiring process.

No analysis of inputprobe DPI Test yet.

Videos

Walkthroughs and reviews on video.

HackerRank 3 videos + Add
inputprobe DPI Test 0 videos + Add

Is HackerRank A Good Idea?

More videos

  • - LeetCode vs HackerRank
  • - Difference between HackerRank, LeetCode, topcoder and Codeforces

No inputprobe DPI Test videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
HackerRank
inputprobe DPI Test
100% 100%
Hiring And Recruitment
0% 0%
0% 0%
Web Utilities
100% 100%
100% 100%
Online Learning
0% 0%
0% 0%
Utilities
100% 100%

Questions & Answers

As answered by people managing HackerRank and inputprobe DPI Test.

How would you describe the primary audience of your product?

inputprobe DPI Test's answer:

PC gamers dialing in sensitivity who want to know their real DPI rather than the nominal number on the box, mouse enthusiasts (the r/MouseReview crowd) comparing sensors and verifying units, and anyone troubleshooting a mouse that "feels wrong", since a few percent of unit-to-unit sensor variance is normal and measurable. More broadly, anyone who prefers a measurement with a stated error band over a confident guess.

What makes your product unique?

inputprobe DPI Test's answer:

Two things. First, it measures instead of guessing: a browser cannot ask a mouse for its DPI, so the test divides raw movement counts by the length of an object that is exact by international standard, every bank card on earth is 85.60 mm long (ISO/IEC 7810), and paper sizes are fixed by ISO 216. Second, it publishes its own error bars. The accuracy bands shown next to your result were measured over 51 complete runs on real hardware (results on A4 stay within ~3% of each other, on a bank card within ~6%), and when a capture can't support a number, the test refuses to print one and tells you why, rather than averaging a mess into a confident-looking figure.

Why should a person choose your product over its competitors?

inputprobe DPI Test's answer:

Most online mouse testers measure your monitor, not your mouse: they count one movement per drawn frame, so results are quietly capped by your display's refresh rate. inputprobe reads the individual device reports with their own timestamps, before that distortion happens. It also handles the errors other testers ignore: it detects OS pointer acceleration instead of blaming your mouse, uses displacement so your drag doesn't need to be straight, and includes an alignment check that solves for your placement error, the one mistake repeatability checks structurally cannot see. And everything runs locally in your browser: no account, no upload, no tracking.

What's the story behind your product?

inputprobe DPI Test's answer:

I tested my own mouse on the popular online testers and got answers that were confidently wrong, most of them were really measuring my monitor's refresh rate. So I built a set of testers around one rule: a verdict must quote the evidence it's based on, and when the evidence isn't good enough, the tool refuses to print a number. That meant doing the unglamorous part: running the DPI method 51 times across two mice to measure how accurate it actually is, publishing those bands next to every result, and writing up the full methodology (including what has not been validated yet) at inputprobe.com/methodology/.

Which are the primary technologies used for building your product?

inputprobe DPI Test's answer:

Plain-vanilla web platform, no frameworks: the measurement engine is dependency-free JavaScript ES modules. The site is static HTML generated by a small Python build (Jinja2 + Markdown), served from Cloudflare's edge. There is no backend at all, every measurement runs entirely in the browser and nothing is uploaded.

Who are some of the biggest customers of your product?

inputprobe DPI Test's answer:

None to list, it's a free tool with no accounts and no tracking, so we genuinely don't know who uses it, and we prefer it that way.

User comments

Share your experience with using HackerRank and inputprobe DPI Test. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

HackerRank no reviews yet
inputprobe DPI Test no reviews yet

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We have no reviews of inputprobe DPI Test yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

HackerRank 67 mentions
inputprobe DPI Test 0 mentions
  • How to Stop Getting Lost in Endless Resources and Stay Focused as a Developer
    This way, you transfer what you already know (problem-solving) but only change the syntax. Platforms like Hackerrank are also great to solve the same problem in different languages and learn from other people’s solutions. - Source: dev.to / about 1 year ago
  • Pick up new languages faster this way!
    Firstly, solve some common data structure problems with it. Implement some data structures like arrays, linked lists, stacks, queues, etc. You can check common problems on LeetCode, Hackerank or some other resources. - Source: dev.to / over 2 years ago
  • Offline alternative of hackerrank.com to practice coding offline
    I don't have a consecutive internet connection and I can't keep up learning process so I started practicing in hackerrank.com I have started some challenges in python and c++ there. Thus I have no internet connection so I cannot practice... Source: almost 3 years ago

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Tracking inputprobe DPI Test since Aug 2026.

Alternatives to HackerRank and inputprobe DPI Test

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