
WolframAlpha
SpeedCrunch
Qalculate!
Numi App
Soulver
Symbolab
Wolfram Mathematica
fxSolver is an free online math solver, equation library, graphing calculator and science/engineering problem helper. To get started, add some formulas, fill in any input variables and press "Solve."

StartupSubmit.app
SubmitWell
Submit Juice
AI Directories
Domain Rank App
Submit.co
SubmitSaaS
See which product directories and launch platforms are worth submitting to, using monthly refreshed traffic, DR, pricing, link, and difficulty signals.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | fxsolver.com | submitrank.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from China · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


Calculate multiple equations at once, Edit existing formulas and Create new ones, Compute large numbers of values, Plot graphs, Link your results, Solve full problems and Share worksheets with your friends. fxSolver is a free tool developed by a team of engineers and programmers with the sole...
🚀 SubmitRank helps founders, marketers, and indie makers find the best sites to submit their product. It ranks directories, launch platforms, communities, and product discovery sites by traffic, authority, pricing, submission fit, and freshness. 🔎 You can quickly spot which sites are worth your...
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
No analysis of SubmitRank yet.
Walkthroughs and reviews on video.
fxSolver Demo
You Shipped Your Product—Now Where Should You Submit It?
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing fxSolver and SubmitRank.
SubmitRank's answer:
Indie Developers, founders, and marketers
SubmitRank's answer:
I'm so tired of managing my backlink sites list manually, so I built SubmitRank
SubmitRank's answer:
It tracks and ranks 400+ submission-friendly websites around the world, organizing them by score, tier, category, and practical submission value.
SubmitRank's answer:
SubmitRank is working on a user feedback platform where people can review, comment on, and share their real submission experiences, making the directory more transparent and useful over time.
Share your experience with using fxSolver and SubmitRank. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


We have no reviews of SubmitRank yet. Be the first one to post
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Startup directory submission service for SaaS, AI, software, and technology companies. Get listed on relevant directories to build visibility, backlinks, and online presence.
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SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
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Get your startup submitted to 500+ quality directories starting at $25. Plus check your Domain Authority score with our free DA checker.
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Qalculate! is a multiplatform multi-purpose desktop calculator.
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Free and curated list of startup directories to promote your new startup. We manually post your startup to more than 150+ relevant directories and blogs to help your startup get discovered.
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