
Mockaroo
DataConstruct
Data Creator
Datamade
Random Data
Generate and manage synthetic datasets easily with DUMMY DATABASE

Calendar With Islamic Dates
Omni Calculator
calculator.net
CalCon Calculator
CalculatorSpan
Time Calc
Calculate date differences, business days, deadlines, sleep windows and recurring spans. CalcSpan shows the assumptions and sources behind each result.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | dummydatabase.com | calcspan.com |
| Pricing | — | |
| Platforms | — | |
| Company | Startup from Serbia · 1 - 9 employees · 2024 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Dummy Database is built to solve a simple, yet annoying problem — generating realistic test datasets quickly, without writing scripts or juggling Excel files. It’s designed for: - Developers needing dummy databases for prototyping & testing. - Analysts and BI specialists preparing demo...
No description of CalcSpan yet.
What each product offers, as listed by its team.


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


As answered by people managing DUMMY DATABASE and CalcSpan.
DUMMY DATABASE's answer
A free, all-in-one data generation platform that builds everything from simple tables to full relational databases with advanced controls, unique event sequences, ERD visualization, built-in SQL querying, and multiple export formats — no limits, no paywalls.
DUMMY DATABASE's answer
Unlike other data generators, DUMMY DATABASE gives you full relational database creation, unique event simulations, advanced control over every field, built-in SQL querying, and generous free limits — so you can go from idea to test-ready data without restrictions, subscriptions, or hidden fees
DUMMY DATABASE's answer
DUMMY DATABASE's answer
Began as a project for myself to be able to have custom datasets for testing purpose I've decided that it could be useful for wider audience and finalized it as a full-stack web project
DUMMY DATABASE's answer
Python, Flask, HTML, CSS, Bootstrap, Redis, PostgreSQL, JavaScript
Share your experience with using DUMMY DATABASE and CalcSpan. For example, how are they different and which one is better?
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A realistic data generator to test your app
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Calendar With Islamic Dates is an elegant mobile application introduced by IslamGhar that provides you the Islamic calendar with the list of important dates and events.
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Helping you make rational decisions, one calculation at a time.
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Data generator that can create a table filled with pseudo-random content.
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Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.
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