Comparison

Black hole finder vs Physics Solver

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

Head to head
About

Black hole finder

Contribute to cutting-edge astronomical research by identifying potential black holes and rare elements. Sift through real-time telescope images to detect fleeting light signals from cosmic events and potentially earn co-authorship on scientific publications.

Highlights
  • Analyze real-time telescope images
  • Detect light signals from cosmic events
  • Contribute to scientific research
  • Potential co-authorship on publications
  • Learn about black holes and neutron star mergers
  • Direct telescopes for additional measurements
Features
Read full description

Welcome to the Black Hole Finder, an exciting citizen science project dedicated to discovering black holes, particularly those formed from the fusion of two neutron stars. You have the unique opportunity to contribute to this cutting-edge research from the comfort of your home, using your phone, tablet, or computer. Our app brings the cosmos to your fingertips. When two neutron stars merge, they create a powerful event, sending gravitational waves through space. These events are detected by our gravitational wave detectors, which alert us to potential black hole formations. Mergers of this kind not only create black holes but also give birth to rare Earth elements such as Iodine, Gold, and Cerium. All these elements, especially Iodine, play crucial roles in supporting life as we know it. In addition to gravitational waves, these cosmic collisions emit light signals. The chase is on to detect these signals with our trio of specially designed BlackGEM telescopes located in Chile. The catch is that the detectors only provide a general localization of the event and the light signals are fleeting. Therefore, we need to act quickly to capture these signals before they fade away after a few days or a week at most. That's where you come in! Using our app, you will sift through real-time images of the sky taken by our BlackGEM telescopes. You will help us spot these light signals, effectively identifying potential new black holes. Not only will you be possibly among the first to set eyes on the light from these celestial events, but with some training, you may also direct telescopes to take additional measurements of intriguing objects. Your contributions to science won't go unnoticed. Participants who make significant discoveries will be offered co-authorship on scientific publications that result from their findings. We also provide training and guidance to enrich your understanding of the cosmos. The Black Hole Finder project is not just about making significant scientific contributions. It's about engaging with the wonders of the universe, learning about the intricate processes that drive its dynamics, and having fun while doing it! So, join us on this thrilling journey of discovery and exploration. Download the Black Hole Finder app now and start your cosmic adventure!

About

Physics Solver

This AI-powered app provides step-by-step solutions and detailed explanations for a wide range of physics topics. It helps students and professionals deepen their understanding of complex concepts with an intuitive interface and advanced algorithms.

Highlights
  • Step-by-step physics solutions
  • Detailed explanations
  • Covers various physics branches
  • Formula calculators
  • Unit conversions
  • Kinematics solvers
  • Circuit analyzers
Features
Read full description

Physics Solver is a state-of-the-art app designed to help students, educators, and professionals tackle physics problems with ease, precision, and confidence. Whether you're working on classical mechanics, electromagnetism, thermodynamics, optics, quantum mechanics, or even advanced topics like relativity and fluid dynamics, Physics Solver provides step-by-step solutions and detailed explanations to enhance your learning experience. With an intuitive interface and powerful algorithms, Physics Solver is built to be a seamless and efficient tool for anyone looking to deepen their understanding of physics concepts. Our app not only delivers instant solutions but also offers in-depth breakdowns, ensuring that users grasp the fundamental principles behind each answer. Whether you're preparing for exams, working on homework, or conducting professional research, Physics Solver is a valuable companion that simplifies even the most complex physics problems. At Physics Solver, our mission is to create accessible, user-friendly, and beautifully designed applications that bridge the gap between humans and technology. Our proprietary algorithms ensure that solutions are not only accurate but also presented in a structured and intuitive format that enhances comprehension. We are committed to making physics learning an engaging and interactive experience, allowing users to build a strong foundation in scientific principles. Physics Solver also supports a variety of essential tools, including formula calculators, unit conversions, kinematics solvers, circuit analyzers, and graphing functions. By leveraging advanced AI-driven techniques, we provide an all-in-one solution tailored to students, educators, and professionals alike. By using this app, you agree to Apple’s Terms of Use, available here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/. Please review our privacy policy at https://physics-solver.apphq.online/privacy.

Screenshots

Black hole finder2 screens
Physics Solver3 screens

Verdict

The call

The clearest difference is rating: Physics Solver at 4.9 against Black hole finder's 4.1. Physics Solver also leads on ratings volume (25 vs 7). Black hole finder's advantage is in-app purchases (none vs 2) and update cadence (every 10 days vs every 3 weeks). On price, ads and device support 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. Physics Solver sells 2 in-app purchases, starting at $9.99 per 7 days. Black hole finder asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Physics Solver holds the better App Store score, 4.9 against 4.1. Both are backed by a comparable volume of ratings — 7 and 25 respectively.

UpkeepUpdate frequency

Black hole finder ships an update every 10 days, Physics Solver every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard6 real differences · 4 level
Black hole finder versus Physics Solver: the parameters behind the verdict, then further details
ParameterBlack hole finderPhysics Solver
PriceFreeFree
Rating4.1 (7 ratings)4.9 (25 ratings) — better
Positive reviews62.5% of reviews—
Number of ratings725 — better
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size81 MB13 MB
Age rating4+4+
DeveloperDDQLiberace Pte. Ltd.

Customer experience

Black hole finder

All ratings7 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews8 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

Physics Solver

All ratings25 ratings
Positive96.0%
Neutral4.0%
Negative0.0%

In-app purchases

None

Black hole finder

No in-app purchases

2 purchases

Physics Solver

Subscriptions2
  • Pro Weekly3 Days trial$9.997 Days
  • Pro Yearly$39.991 Year

Questions

Is Black hole finder free?
Black hole finder is free to download, with no in-app purchases.
Is Physics Solver free?
Physics Solver is free to download, with in-app purchases available.
Which has better reviews, Black hole finder or Physics Solver?
Physics Solver is rated higher. Black hole finder averages 4.1 out of 5 from 7 ratings, while Physics Solver averages 4.9 from 25 ratings.
Do Black hole finder or Physics Solver have ads?
Neither Black hole finder nor Physics Solver shows ads.
Which is updated more often, Black hole finder or Physics Solver?
Black hole finder ships an update every 10 days, and Physics Solver every 3 weeks. Most recently, Black hole finder was updated on October 24, 2026 and Physics Solver on October 25, 2026.

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