Contact us
A person reads every message. Below is who to write to, and what to expect.
| Reason | Address | Typical response |
|---|---|---|
| Technical support, a design that looks wrong, an account problem | support@onelinestudio.us | One business day |
| Pricing, invoicing, purchase orders, volume licensing | sales@onelinestudio.us | One business day |
| A correction to an article, or a code citation you believe is wrong | support@onelinestudio.us — subject line “Correction” | Two business days |
| Privacy, data access or deletion requests | support@onelinestudio.us — subject line “Privacy” | Within 30 days |
Telephone
+1 781 492 0243 — United States business hours, Central Time. Voicemail is transcribed and answered by email.
Postal address
Zappfin LLC
Aspen Ln, Pingree Grove, IL 60140, USA
Corrections
If a calculation or a code citation on this site is wrong, we want to know and we will fix it. Tell us the page, the number you believe is incorrect, and the code section you are reading it against. Corrections are applied to the article and noted with the date. See our editorial policy for how that process works.