Calling abroad should
not cost a fortune
Telvio exists because international calls are overpriced. We built a simple app that connects you to any phone number in the world over WiFi, at rates that make sense.
Our mission
International communication should be accessible to everyone. Travelers calling home, expats staying connected with family, professionals reaching clients overseas — all deserve affordable, reliable calls without subscriptions, accounts, or expiring credit.
Telvio is built on a simple premise: pick up your phone, dial a number anywhere in the world, and pay a fair price. Nothing more.
How we do things differently
Zero registration
We do not ask for your email, phone number, or any personal information. Download the app and start calling. Your privacy is not a feature we market — it is a principle we follow.
No subscriptions
Buy minutes when you need them. No monthly plans, no auto-renewals, no penalty for not calling. Your balance stays until you use it.
Transparent pricing
Every country has a per-minute rate. That rate is visible before you call. No connection fees, no per-call minimums, no hidden surcharges.
What we believe
Simplicity
A calling app should open fast, dial fast, and connect fast. Every feature must justify the complexity it brings. Most of the time, the answer is to do less.
Transparency
Rates are public. Pricing is straightforward. No tiers to decode, no bundles to compare, no promotional pricing that changes after the first month.
Privacy
We do not collect personal data beyond what is technically necessary to route your call. No registration means no user profiles, no email lists, no data to sell.
Merey Tleugazin
Founder
Founder of Telvio. Writes the guides and technical reference on telvio.app himself, because the person who negotiates the wholesale calling rates is the person who knows which of them are genuinely cheap.
Why this exists
Telvio started from an ordinary problem: calling a landline in another country costs a ridiculous amount of money, and almost none of that cost is technical. The call itself travels over the same internet everything else does. What you are paying for is a chain of intermediaries and a per-minute price structure designed in an era when a voice circuit was a physical thing.
The app is one answer to that — dial an ordinary phone number over your data connection, pay by the second, and skip the roaming charge entirely. The site is the other half: a reference for how international dialling actually works, because that turns out to be almost as much of an obstacle as the price.
We are a small team. That has one consequence worth stating: the person who negotiates the wholesale rates is the person who writes the pages about them, so the numbers on this site are not a marketing department's version of somebody else's data.
How we make money, and what that means for what you read
Telvio makes money on the margin between the wholesale termination rate and the retail price of a minute. There is no subscription, no advertising on this site, and no affiliate links anywhere on it.
That last point matters for the editorial. A site paid per outbound click has a structural reason to recommend whichever service pays most; this one has a structural reason to be right, because the only conversion that pays is somebody deciding the app is worth installing after reading an honest page.
So the comparisons say where a competitor is better. The rate pages say which corridors are expensive rather than calling everything cheap. The feature pages say there is no emergency calling and no incoming number. None of that is generosity — it is the only version that survives a reader checking.
What we publish and how it is checked
- Rates come from one file. Every price on the site is rendered from the same source that prices the app, at build time. Nobody types a number into a page, so a rate change propagates everywhere at once and a page cannot quietly go stale.
- Dialling data comes from published numbering plans. Country codes, exit codes, trunk prefixes and area codes are reference data. Where a country has changed its plan and we have not caught it, that is a mistake to report rather than a judgement call.
- Third-party figures are labelled. Roaming charges, calling-card prices and competitor rates are somebody else's numbers and appear as such, with the source named at the point of use.
- Articles carry a named author and a real date. The date moves when the content moves, never for the sake of looking fresh.
- Corrections are made in place. If something here is wrong, write to us and the page changes.
The company
Telvio is built by Vast Flow, LLP. The app is published on the App Store; payment is handled entirely by Apple, so no card details reach us.
The app holds no account, which means there is very little data to hold at all — no email, no password, no verified phone number, nothing to lose in a breach. The privacy policy sets out exactly what is and is not collected, and the terms cover the rest.
Editorial responsibility for this site sits with one named person rather than with a brand. Who that is, what they work on, and the rules the pages are written to are all on the author page.
How this site is built
Static HTML, generated ahead of time, served from a single origin behind a CDN. There is no database behind a page view and no server-side rendering, which is why the pages load quickly on a weak mobile connection — the same connection the app is designed for.
Every price on the site comes from one source file and is rendered in at build time. Dialling data comes from published numbering plans held the same way. That is a deliberate architecture rather than a convenience: it makes it impossible for a page to state a rate the product does not charge, which is the failure mode that makes most commercial sites untrustworthy in detail.
The site is published in many languages. Translations are produced from the English source and validated automatically — same structure, same numbers, correct script — and a translation that fails validation is left in English rather than shipped broken. Prices are never translated; they are substituted at build time from the same file, so no translator can accidentally edit a number.
The free tools run entirely in the browser. The microphone tests use the browser's own audio pipeline and upload nothing; the number validator and the cost calculator work from a lookup table that ships with the page. None of them needs a server, which is also why none of them can leak anything.
Bottom line
Telvio is an app for calling ordinary phone numbers over the internet, built by Vast Flow, LLP, and this site is its reference half. There is no advertising and there are no affiliate links on it.
Every rate here is rendered from the same file that prices the app; every third-party figure is labelled as somebody else's; and every article has a named author and a date that moves only when the content does.
Nothing on this site is generated and published without being read. The pages are written by one person, the rates are rendered from one file, and the translations are validated against the English structure before they ship. That is slower than the alternative, and it is the only version we would be willing to put a name on.
Frequently asked questions
Who is behind Telvio?
Vast Flow, LLP, a small team. The person who negotiates the wholesale calling rates is the same person who writes the pages about them, which is why the figures on this site are not a marketing department's reading of somebody else's data.
How does Telvio make money?
On the margin between the wholesale termination rate it pays to reach a destination and the retail price of a minute. There is no subscription, no advertising on this site and no affiliate links anywhere on it.
Are there affiliate links on this site?
No. A site paid per outbound click has a structural reason to recommend whichever service pays most; this one has a structural reason to be accurate, because the only thing that converts is a reader deciding the app is worth installing after reading an honest page.
Where do the rates on this site come from?
From a single source file that also prices the app, rendered into every page at build time. Nobody types a price into a page, so a rate change propagates everywhere at once and a page cannot quietly go stale.
What data does the app collect?
Very little, because there is no account: no email, no password and no verified phone number. Payment is handled by Apple, so no card details reach us, and calls are not recorded. The privacy policy sets out the detail.
Who writes the articles?
One named person rather than a brand, with a byline and a real publication date on every article. The author page sets out who that is, what they work on, and the editorial rules the pages are written to.
