Education & Reference
AbacusTool
Free interactive abacus tool for learning Soroban and Suanpan arithmetic.
90/100
7-Frame production-readiness — according to Legit.Show
Is AbacusTool production-ready?
Legit.Show measured AbacusTool at 90 out of 100 on its 7-Frame production-readiness benchmark (public-surface assessment). Its strongest frame is Accessibility (100); its weakest is Security (65). Every frame is measured deterministically from the public surface — exactly what was observed is shown below.
The 7 Frames
- Performance — 88/100
- Accessibility — 100/100
- Security — 65/100
- Privacy — 75/100
- Reliability — 100/100
- Standards — 100/100
- Discoverability — 100/100
What we measured
- Security headers present: HSTS, X-Content-Type-Options, Referrer-Policy.
- No Content-Security-Policy.
- Served over HTTPS with a valid certificate.
- Lighthouse performance score 88/100 (128 ms to first byte).
- Returns a proper 404 for unknown routes.
- 3 of 3 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
Who it's for
Students · Math learners · Educators · Mental arithmetic practitioners
Pricing
100% Free - No Signup Required