
LeetCode
Exercism
Codewars
HackerRank
CodeSignal
CodinGame
CodeCombat
Project Euler is a series of challenging mathematical/computer programming problems that will...

Snug Safety
Kitestring
bsafe
I’m Still Okay
CheckIn More
Dooinwell
Noonlight
Daily check-in app for people living alone, solo travellers and lone workers. One tap keeps your circle informed. No app needed on their end. Free to start.

Which is more popular?
Based on our record, Project Euler seems to be more popular. It has been mentioned 415 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | projecteuler.net | tapokie.com |
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| Platforms | — | |
| Company | — | Startup from the United Kingdom · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Project Euler yet.
TapOkie A Gentle Way to Say, “I’m OK” TapOkie is a calm daily safety check-in app designed for people who live alone, travel frequently, work late, or simply want an easy way to reassure loved ones they are safe. Instead of constant location tracking or panic-focused safety apps, TapOkie keeps...
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
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Project Euler Challenges 1–4 - Coding Challenges with Florin
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Project Euler and TapOkie.
TapOkie's answer:
TapOkie is currently focused on growing its consumer user base and has not publicly listed major enterprise customers yet.
TapOkie's answer:
TapOkie was created around a simple human need: letting loved ones know you are safe without needing constant messages or calls. Many existing safety apps felt overly emergency-focused or invasive, so TapOkie was designed to offer a calmer and more respectful alternative. The idea was to create a gentle daily habit that quietly brings peace of mind to both users and their trusted contacts.
TapOkie's answer:
TapOkie is designed for people who live alone, elderly parents, solo travelers, students living abroad, remote workers, night shift workers, and families who want a simple way to stay reassured about loved ones’ safety. It is especially useful for users who want lightweight personal safety without intrusive tracking.
TapOkie's answer:
Many safety apps focus heavily on emergencies, constant surveillance, or complicated monitoring systems. TapOkie takes a gentler approach with simple recurring check-ins, flexible schedules, trusted contact alerts, and a calm user experience. It is ideal for people who want peace of mind without feeling watched all the time.
TapOkie's answer:
TapOkie focuses on calm daily safety check-ins instead of panic buttons or invasive live tracking. The app is designed to feel lightweight, reassuring, and human. Users simply confirm they are OK through scheduled check-ins, and trusted contacts are only notified if something is missed. The experience is intentionally privacy focused and built to reduce anxiety rather than create it.
Share your experience with using Project Euler and TapOkie. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Project Euler provides a large collection of challenges in the domain of computer science and mathematics. The challenges typically involve writing a small program to figure out the solution to a clever mathematical...
If you are studying algorithms and computer programming, chances are you’ve heard of Project Euler. A collection of mathematical problems made for problem solvers who are interested to combine mathematics and...
We have no reviews of TapOkie yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Let's hope this is going to help me solve some more Project Euler [1] problems! [1] https://projecteuler.net/. - Source: Hacker News / 4 months ago
Https://projecteuler.net/ for "Thinker" brain food. (it still has the issue of not being a pragmatic use of time, but there are plenty interesting enough questions which it at least helps). - Source: Hacker News / 8 months ago
I have a Project Euler (https://projecteuler.net/) account. Though I do not register at all on the leader board I will sometimes work obsessively on a problem just to make one of the level icons light up for me. There is not really... - Source: Hacker News / 9 months ago
Tracking TapOkie since May 2026.
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