
Equity Calculator
SalaryOrEquity
Startup Equity Calculator
FounderPool
Convertible Notes Calculator
Carta
Startup Return Calculator
An open-source OS for calculators

Exam.net
StudySpaces is a white-label tutoring and test prep platform with built-in SAT, ACT, etc. curriculum, auto-graded mock exams, and a branded student portal.

Which is more popular?
Based on our record, KnightOS seems to be more popular. It has been mentioned 6 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | knightos.org | studyspaces.com |
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What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using KnightOS and StudySpaces. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


It looks like your calculator is running KnightOS, a custom operating system for TI z80 calculators. If you no longer want to use it, you can reinstall TI-OS. I suggest looking at the KnightOS website for further instructions:... Source: over 3 years ago
The creator also made https://knightos.org, written in z80 asm. Source: over 4 years ago
Well, whilst it can't quite play Skyrim, because the TI is built around a z80, you can have a full operating system is you'd like. Source: almost 5 years ago
Tracking StudySpaces since Nov 2026.
When comparing KnightOS and StudySpaces, you can also consider the following products.

Figure out what your equity is worth
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A platform for creating and conducting exams and assessments.
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A tool to quantify equity as an approximate salary.
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Figure out how much equity to grant new hires in seconds.
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De-Risking startup founders by pooling equity
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Tool to calculate how convertible notes will convert
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