Terms of Service

About these terms

These Terms of Service govern the contract between Nexis Studio and the business or office that uses our phone assistant, including the app at app.nexistudio.dev (the service). In these terms we call the business or office that uses the service the customer or "you".

You enter into the contract when you sign up in the app and tick that you accept these terms and the Data Processing Agreement. We record the time of acceptance and the version you accepted.

The Data Processing Agreement is part of these terms and governs how we process your callers' data on your behalf. How we process data for which we are the controller ourselves, for example the data about your user account, is set out in our Privacy Policy.

For the Po mjeri (custom) plan we make a separate written agreement. These terms also apply to it, except where that agreement says otherwise.

We publish these terms in Croatian and English. Both versions have the same content; if they nevertheless differ, the Croatian version prevails.

This version applies from 13 September 2026.

The provider

The service is provided by the sole trader business (obrt) NEXIS STUDIO. An obrt has no separate legal personality, so the contracting party is its owner. In these terms we call the owner and the obrt together Nexis Studio or "we".

• Registered name: NEXIS STUDIO, obrt za uredske i pomoćne uredske usluge, vl. Luka Djogaš, Buje, Juki 141
• Owner: Luka Djogaš
• Registered address: Kaštel, Juki 141, Buje
• OIB (Croatian tax identification number): 63105181019
• Email: support@nexistudio.dev

Who can use the service

We offer the service only to business customers: companies, sole traders, private practices and other entities that have an OIB, for the purposes of their business. The service is not intended for consumers.

The person who signs up confirms that they enter into the contract on the customer's behalf and are authorised to do so.

When signing up you enter the customer's OIB. Using the OIB we check the customer's name, address and status in the Croatian court register and in the VIES system, and you confirm the name and address found. How we do this is set out in our Privacy Policy. If the details are not correct, or if the customer does not exist, is in liquidation, in bankruptcy or has been struck off, we may refuse or stop the service.

The office number from which calls are forwarded to the assistant must be a Croatian or Slovenian phone number.

What the service does

When nobody at your office can pick up, the office phone forwards the call to our number and an AI assistant answers. The assistant:

• Introduces itself at the start of the call with your office's name and says that it is an automated AI assistant and that the call is recorded.
• Speaks Croatian.
• Answers questions only from the information you entered in the app, for example opening hours, services, prices, and questions and answers.
• Takes a message with the caller's name, the reason for the call and a callback number, and flags urgent messages.
• If you have switched on booking and connected a calendar, offers free slots and books the slot the caller chooses.
• After the call, sends you a summary by email, and you can see the summary, transcript and recording of the call in the app.

In the dashboard at app.nexistudio.dev you edit the assistant's information and settings, review calls and manage your subscription. You can switch off call summaries by email.

The assistant does not transfer calls and speaks only Croatian. The scope of the Po mjeri plan is agreed separately.

What the service does not do

The assistant is not an emergency service. If a caller describes an urgent health problem, an injury or a danger, the assistant tells them to call 112 immediately, gives no other instructions and flags the message as urgent. Make sure your callers do not depend on the assistant in an emergency.

The assistant does not give legal, tax, medical, financial or technical advice or assessments. It takes such questions down as a message for your office.

The assistant works with AI and can make mistakes: mishear a name or number, summarise a call inaccurately, or answer differently from what your information says. For important calls, check the recording or transcript. A person at your office always decides on the next steps.

We cannot guarantee that every call reaches the assistant. This also depends on your phone operator, on the forwarding set up on your phone, and on the service providers the service is built on (see the section "Service providers").

Plans and prices

The subscription is paid monthly. Plans:

• Asistent 100: EUR 49 per month, 100 minutes of calls in the billing month.
• Asistent 300: EUR 99 per month, 300 minutes of calls in the billing month.
• Po mjeri (custom): scope and price under a written agreement.

Prices are final; no VAT is charged (PDV nije obračunat).

We count minutes from the duration of counted calls. These are phone calls the assistant takes for your office that last at least 15 seconds. Shorter calls, test calls from the app and the call you made to check forwarding are not counted. We add up durations in seconds and show the minutes used rounded up to the next whole minute. Unused minutes do not carry over to the next month.

When you have used 80 % of your plan's minutes and when you have used all of them, we will let you know by email. The assistant keeps taking calls after that, and we do not charge automatically for extra minutes. If you regularly use more minutes than your plan includes, we may suggest a larger plan. We could only introduce a charge for extra minutes by changing these terms (see the section "Changes to these terms").

You can change your plan in the dashboard, with the Upravljanje pretplatom (manage subscription) button.

Free trial

The free trial covers the first 25 counted calls (see the section "Plans and prices") and lasts at most 30 days. It ends when the first of these two conditions is met.

The free trial requires a card, which you enter with Stripe. We charge nothing during the free trial. Before charging starts, we warn you by email: when you have used 20 of the 25 free calls, or three days before the 30 days run out.

When the free trial ends, Stripe charges the card for the first month of the chosen plan, and then for every following month.

We grant the free trial once per OIB. If a customer with the same OIB has already had a free trial or a subscription, charging starts immediately. If the same card has already been used for another customer's free trial, we may end the free trial and start charging immediately, or refuse the service.

If no call forwarded from your office number arrives during the free trial, the subscription ends without charge when the trial runs out, and we let you know by email. If no such call arrives within 7 days of signing up, we send you a reminder.

If you cancel the subscription during the free trial, nothing is charged.

Payment

You pay for the subscription by card, monthly in advance. Stripe (Stripe Payments Europe, Limited, Ireland) processes payments for us. We do not see or store the card number.

The billing month starts on the day the free trial ends or, if there is no free trial, on the day the subscription starts.

We issue an invoice for every charge through Stripe, in the customer's name, with its address and OIB.

If a payment fails, Stripe tries to charge the card again and we let you know by email. The assistant then takes 5 more counted calls, after which callers hear only a short notice that the office cannot answer right now. You can change your card in the dashboard, with the Upravljanje pretplatom (manage subscription) button. Once the payment succeeds, the assistant takes calls again.

We may change prices. We will tell you about a price change by email at least 30 days in advance, and the new price applies from the first billing month that starts after that period. If you do not agree with the change, you can cancel the subscription before the new price applies.

Cancellation and refunds

You can cancel the subscription at any time in the dashboard, with the Upravljanje pretplatom (manage subscription) button. Cancellation takes effect at the end of the billing month you have already paid for, and until then the assistant works as before. We do not refund the rest of a paid month, except in the case described in the next paragraph.

If you cancel in a paid billing month in which the assistant took no counted call, we end the subscription immediately and refund that month's invoice in full to your card. The refund arrives within a few days, depending on your bank. This does not apply to the free trial, in which you paid nothing.

You can also delete your account yourself in the dashboard, with the Obriši račun (delete account) button. The subscription then ends immediately, without a refund for the current month, and we delete the data as described in the section "Data after the subscription ends".

When the subscription ends, the assistant no longer takes calls, and callers hear only a short notice that the office cannot answer right now. You switch off forwarding on the office phone yourself, with the code ##004#. While forwarding is on, calls still come to our number, and your operator charges you for the forwarding.

Data after the subscription ends

When the subscription ends, we delete your office's calls, messages and appointments from our database 30 days later, and at that point we also delete your assistant on the Vapi platform. If you renew the subscription before that date, everything stays as it was. We disconnect your calendar immediately.

While the subscription runs, we delete call recordings and transcripts 90 days after the call, and summaries, messages, appointments and other call records after 12 months. The details are in the Data Processing Agreement.

We keep invoices and other business records for as long as tax and accounting rules require. The sign-in user account is not deleted automatically; we will delete it at your request sent to support@nexistudio.dev.

Your obligations

As a customer of the service you take on the following obligations:

• You use the service lawfully and only for the purposes of your business. You may not use the assistant to deceive callers or for anything unlawful.
• You are the controller of your callers' data. You decide the legal basis for the processing and inform callers about it in line with the General Data Protection Regulation, for example in your own privacy notice.
• At the start of every call the assistant says that it is an automated AI assistant and that the call is recorded. You cannot switch off or change this notice, and you may not ask for the assistant to present itself as a human.
• You enter the information the assistant answers from, such as opening hours, services, prices, questions and answers, and notes, and you are responsible for its accuracy and lawfulness. Keep it up to date.
• You forward calls only from a number that you or your office uses and on which you are allowed to switch on forwarding.
• You bear the cost of forwarding and any other charges from your phone operator.
• You keep your sign-in details secret and are responsible for actions taken with your user account. If you suspect misuse, write to us immediately at support@nexistudio.dev.
• You enter changes to the customer's details, for example its name, address or email address, in the app, or tell us about them.

Health and other sensitive data

The assistant asks callers only for the reason for the call in one sentence and does not ask for health details or other sensitive data. In the calendar it records only a neutral visit type, for example the name of a service or a word such as "pregled" (check-up), and never symptoms or the caller's own words.

A caller may still mention health or other sensitive data on their own. That data then stays in the recording, transcript and summary until the retention periods run out.

If you are a healthcare provider, a private practice or another customer with special duties of confidentiality or data protection, you remain responsible for those duties, including assessing whether the service is suitable for you.

Service providers

We provide the service with the help of outside providers. They include Telnyx (phone number and calls), Vapi (assistant platform), Deepgram, OpenAI and ElevenLabs (speech to text, language model and synthetic voice, within the Vapi platform), Vercel (application), Supabase (database), Stripe (payments), Resend (email), Google (sign-in with Google and Google Calendar) and Anthropic (the helper for filling in office details). The full list, and what each of them does with data, is in our Privacy Policy and the Data Processing Agreement.

If you connect Google Calendar, the terms you accepted with Google also apply to your Google account and calendar.

Availability and changes to the service

We do our best to keep the service running without interruption, but we do not guarantee any particular availability. The service may be unavailable because of maintenance, errors or outages at service providers or phone operators.

We develop the service and may change it. If a change substantially reduces what you have paid for, we will tell you by email at least 30 days in advance, and you can cancel the subscription before the change takes effect.

If we decide to stop providing the service, we will tell you by email at least 30 days in advance. For the part of a paid month after the service stops, we will refund a proportionate part of the amount.

Suspension and termination by us

We may suspend the service or terminate the contract if:

• you use the service contrary to these terms or the law;
• the customer's details are not correct, or the customer does not exist, is in liquidation, in bankruptcy or has been struck off;
• the subscription remains unpaid even after a warning;
• a competent authority requires it, or it is necessary to prevent harm to callers, other customers or the service.

Before we do so, we will tell you by email and, where possible, give you time to remove the reason. In the case of a serious breach we may suspend the service immediately.

Liability

For damage we cause you by breaching this contract, our liability is limited to the total fees you paid us in the 12 months before the event that caused the damage.

We are not liable for damage caused by:

• missed calls due to a fault or settings at the phone operator, or due to forwarding that is not switched on or does not work;
• outages or errors at the service providers the service is built on, for example Vapi, Telnyx, Google or Stripe;
• AI mistakes, for example a misheard name, number or reason for the call, or an inaccurate summary, except to the extent we are liable for them by law;
• inaccurate or outdated information you entered in the app.

These limitations do not apply to damage we cause intentionally or through gross negligence, or in other cases in which the Croatian Civil Obligations Act (Zakon o obveznim odnosima) or other law does not allow liability to be limited or excluded. Liability for breaches of data protection law is also governed by the Data Processing Agreement.

Your data and our rights

The information you enter in the app and the recordings, transcripts and summaries of your calls remain yours. We use them only to provide the service, and we process callers' data as described in the Data Processing Agreement.

The app, the assistant, its instructions and the other parts of the service belong to us or our providers. While the subscription runs, you may use the service for the purposes of your business, but you may not copy, resell or pass it on to others.

Changes to these terms

We may change these terms. We will tell you about changes by email at least 30 days before they take effect, and we publish the new version with its date on this page.

If you do not agree with the changes, you can cancel the subscription before they take effect. If you keep using the service after that date, you are deemed to have accepted the changes.

Changes required by law or by a decision of a competent authority may take effect sooner, if that law or decision requires it.

Governing law and disputes

This contract is governed by the law of the Republic of Croatia.

If you have a complaint, please write to us first at support@nexistudio.dev, and we will try to resolve it by agreement.

Disputes we cannot resolve by agreement fall under the court with subject matter jurisdiction in the Republic of Croatia for the provider's registered seat (Buje).

Notices and contact

We send notices about the service, the subscription and changes to these terms to the email address you entered in the app.

You can write to us at support@nexistudio.dev or by post to Kaštel, Juki 141, Buje.