Preview. These maps are our reading of public sources and haven't been checked with the projects' maintainers yet.
Sumday
Make a true equation from today's date, using every digit in order. Any valid equation counts.
www.playsumday.com/Active
Show HN 2026-08-27; site live 2026-10-25 with accounts and leaderboard. (checked 2026-10-25)
In Daily puzzle games
What it shares with most of the community
- Is it actively maintained? active (95% of 21 others)
- How is the main thing licensed? proprietary or closed source (86% of 21 others)
- Can it run entirely on your own device or infrastructure, without the maker's servers? no, it needs the maker's servers (86% of 21 others)
- Who is it for? non-developers (100% of 21 others)
- Does everyone get the same puzzle each day? yes, one shared daily puzzle (or set) and nothing more (50% of 20 others)
- How does it make money? Pick the first that applies. none: free, no ads, nothing to buy (50% of 18 others)
- How do players share a result? copyable result text (emoji grid or score line, maybe with a link) (76% of 17 others)
- Where can you play it? web only (57% of 21 others)
- Which languages is it offered in? English only (70% of 20 others)
Not documented
The public sources we read don't say:
- How is it mainly sustained?
Nearest neighbors
- Jigsaw Haiku 90% of 10 shared answers match
- PZL Games 90% of 10 shared answers match
- Dozenal 80% of 10 shared answers match
Every answer
| Question | Answer | Source |
|---|---|---|
| Is it actively maintained? | active | source 2026-10-25 |
| How is the main thing licensed? | proprietary or closed source | source 2026-10-25 |
| How is it mainly sustained? | Not documented No maker, ads or pricing information; only a contact email. | source 2026-10-26 |
| Can it run entirely on your own device or infrastructure, without the maker's servers? | no, it needs the maker's servers | source 2026-10-25 |
| Do you need an account to use it? | optional account v4: from the map's own 'accounts' question. Optional Supabase email account to keep days across devices and set a leaderboard name. | source 2026-10-25 |
| Who is it for? | non-developers | source 2026-10-25 |
| Which shared standard or format does it mainly build on? | none of these (its own format or interface) Its own date-equation puzzle. | source 2026-10-26 |
| Does everyone get the same puzzle each day? | yes, one shared daily puzzle (or set) and nothing more One date per day for everyone; any valid answer wins. | source 2026-10-25 |
| How does it make money? Pick the first that applies. | none: free, no ads, nothing to buy None seen. | source 2026-10-25 |
| How do players share a result? | copyable result text (emoji grid or score line, maybe with a link) | source 2026-10-25 |
| Can players rank against other players? | yes, a leaderboard or rating Leaderboard with names and counts (site code). | source 2026-10-25 |
| Where can you play it? | web only Static site (GitHub Pages). | source 2026-10-25 |
| Which languages is it offered in? | English only | source 2026-10-25 |
Sources
This page was derived from:
- Hacker News · news.ycombinator.com/item?id=49464247 · read 2026-10-25
- Web page · www.playsumday.com/ · read 2026-10-25
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