QTS One
QTS One builds and operates web software. It is a sole proprietorship (Einzelunternehmer) registered in Germany, run by one person.
Today it sells one product.
Ace the Role — interview preparation
Practice real interview questions across role-specific paths, get AI feedback anchored to written reference answers, and track your progress session by session.
What you buy are Practice Credits, which pay for AI-graded answers:
| Starter | 100 credits — €9 |
| Standard | 300 credits — €22 |
| Power | 1000 credits — €59 |
| 90-day Prep Pass | €129 — one-time payment for fixed-duration access, not a subscription |
Every account gets 5 free credits on signup, with no card required.
Prices, taxes and payment details are shown before you pay. Stripe provides payment processing; eligible payments are processed through Stripe Managed Payments / Link as merchant of record where supported. The prices and terms that apply to a purchase are the ones published on acetherole.com at the time of purchase.
Customer service
- Product, account and billing questions: support@acetherole.com
- Business enquiries and anything else: contact@qts.one
QTS One is a one-person business, so please allow a little time for a reply.
Imprint / Impressum
Cecilia Rodica Bacalu-Cerna
QTS One (Einzelunternehmer / sole proprietor)
Lehrter Str. 23A
10557 Berlin
GermanyContact: contact@qts.one
Responsible for content: Cecilia Rodica Bacalu-Cerna
Legal
The full Impressum, privacy notice, terms of service and security notice for the product are published on the product site: