Unitron Smile vs Phonak Infinio: Which Is Right for You?

Written by Shahabuddin Khan, Director Medically reviewed by Dr. Nayeem Ahmad Siddiqui, Senior ENT Surgeon (MBBS, DLO, DNB)

Fairfield Hearing Clinics, New Delhi · Updated August 2026 · Reading time ~11 minutes

1. The family secret: these two are siblings

Walk into a hearing clinic and you may be shown a Unitron and a Phonak device side by side, as if they were competitors from different worlds. The truth is far more interesting: both brands belong to the same Swiss parent company, Sonova [5].

They share research, engineering and even hardware. Reports note that Unitron and Phonak receiver-in-canal systems use the same receiver types, power levels, wire lengths and connectors [5]. And most importantly, the newest platforms from both brands are built on Sonova's ERA chip: Phonak introduced it with Infinio in 2024, and Unitron brought it to the Smile platform in 2025 [5].

So the honest question is not "which brand is better?" It is "what did each brand build on top of the shared brain, and which of those things do I actually need?"

2. The shared brain: what the ERA chip does

Think of the chip as the engine of a hearing aid. It decides how quickly and how cleverly the device can process sound. The ERA chip is the modern Sonova engine that both platforms sit on, and it gives both families the same solid foundation: fast processing, good sound quality, and modern wireless connection [1][2][5].

Because of this shared base, a Unitron Smile device and a Phonak Infinio device will often sound closer to each other than most people expect. The differences appear mainly in the hardest listening situations, and in the experience around the device.

3. Unitron Smile: friendly intelligence, and freedom to try

Unitron launched the Smile platform in 2025 as its most advanced chip-and-software combination to date [1]. On top of the ERA chip it runs an AI-trained system called Integra OS. In simple terms, the hearing aid listens to your surroundings, recognises what kind of place you are in, and adjusts itself. Reported highlights include:

• Automatic scene sensing across eight common listening situations, so you do not have to keep fiddling with settings [1].
• HyperFocus, which helps you follow a conversation when there is noise around you, and Speech Enhancement to reduce listening effort [1].
• An AI Dome Proposer, which helps your audiologist pick the right ear tip for you - a small detail that strongly affects comfort and sound [1].
• Much stronger Bluetooth, reported as up to six times more transmission power, for steadier streaming from phones [1].

Popular Smile-platform styles include the slim, water-resistant rechargeable Moxi receiver-in-canal model - reported at around 24 hours of use per charge, or about 16 hours with several hours of streaming - and, from 2026, the Insera in-the-ear family including a discreet completely-in-canal option [1].

4. Phonak Infinio: and the second brain built only for noise

Phonak introduced the Infinio family in 2024 on the same ERA chip, running its well-known automatic system, AutoSense OS 7.0 [2][3]. Standard Infinio models are excellent all-round hearing aids.

But there is one model that changed the conversation: the Audeo Sphere Infinio. It carries a first-of-its-kind two-chip design - the ERA chip plus a second chip called DEEPSONIC, whose only job is to separate speech from background noise in real time using a deep neural network [2].

Why the second chip matters

• In most hearing aids, the AI must share chip space with every other task. Here, one chip does nothing but lift speech out of noise [2].
• It is reported to have around 53 times more processing power than earlier Phonak chips, performing about 7.7 billion operations per second [2].
• In independent laboratory testing by HearAdvisor, it recorded the highest speech-in-noise scores among prescription hearing aids tested [2].
• A 2025 update, renamed Infinio Ultra, reported roughly 30% better battery efficiency and a smarter AutoSense trained on far more real-world scenes [2].

One caution: this power is only in the Sphere versions. A standard Infinio model does not include the DEEPSONIC chip [3]. If your main problem is noisy restaurants, weddings or markets, that distinction matters more than the brand name on the box.

5. Unitron's quiet superpower: try before you buy

Now the part that rarely makes headlines but changes real lives. Buying a hearing aid is stressful because you pay first and discover later. Unitron built its answer to that problem years ago, and it still stands out: the Flex trial approach [4].

With it, your audiologist can send you home with hearing aids for a genuine trial period - commonly around 30 to 60 days - and, crucially, can program the very same device to behave like different technology levels [4]. That means you can literally listen to the difference between a mid-range and a premium setting in your own kitchen, office and place of worship, and then decide what is worth your money.

There are also tools that log your real listening life and let you rate how the aids performed in the moment, so the final fitting is based on your actual days, not guesswork in a quiet room [4].

This is a powerful idea for Indian families in particular, where budgets are carefully considered and trust must be earned. Instead of arguing about which model is better, you get to hear the answer for yourself.

6. Side by side: the honest comparison

Details are summarised from manufacturer announcements and independent hearing-industry reporting [1][2][3][4][5]. Model names, features and availability differ by country and change over time.

7. What you are really paying for: technology levels

Here is another thing many buyers never learn. Within one family, the outer shell is often identical. What changes with price is the software inside - and that software mostly decides how well the aid copes when many people talk at once [3].

Phonak Infinio Ultra, for example, comes in four levels (90, 70, 50 and 30), while the Sphere version comes in two (90 and 70) [3]. Higher levels handle complex, noisy scenes better; lower levels are fine for quieter, simpler days.

The practical lesson: do not choose a level from a price list. Choose it from your life. If your hardest moments are family functions and busy markets, a higher level earns its cost. If your days are mostly quiet and at home, paying for the top level may add little.

8. So which one should you choose?

As audiologists who fit both brands, our honest guidance is that this depends on your life, not on marketing. Broadly:

Phonak Infinio Sphere may suit you if

• Your biggest struggle is understanding speech in noisy places - restaurants, weddings, markets, large family gatherings.
• You want the strongest available technology for noise and are comfortable investing in it.
• You are socially very active, or still working in busy environments.

Unitron Smile may suit you if

• You want excellent modern technology with strong value for money.
• You are a first-time user and would feel safer trying the device properly at home before paying.
• You want to compare technology levels yourself and decide what is genuinely worth it.
• You want a comfortable, discreet daily device for mostly ordinary environments.

And if you are unsure, that is exactly what a trial is for.

9. The factor that beats both brands

Here is the truth that no advertisement will tell you: a well-fitted mid-range hearing aid will almost always beat a poorly fitted premium one.

What decides your everyday success is the quality of the professional work around the device - an accurate hearing test, the correct receiver power, the right dome or custom earmold, careful programming to your hearing chart, and follow-up visits to fine-tune as your brain adjusts. Both Unitron and Phonak make genuinely good hearing aids. The difference between hearing well and hearing brilliantly usually sits with the fitting, not the logo.

10. Conclusion

Unitron Smile and Phonak Infinio are not enemies. They are two children of the same Swiss family, sharing a brain and taking different paths. Phonak chased raw power in noise and built a second chip to prove it. Unitron chased confidence and comfort, and lets you test the promise before you pay for it.

Both are strong, modern choices. The one that will change your life is the one matched properly to your hearing, your ears and your daily world - and then fitted with care. Start with a professional hearing test, ask for a trial, and let your own ears cast the deciding vote.

Let your own ears decide.

We fit both Unitron and Phonak. Book a free hearing test and a no-obligation trial with our RCI-certified audiologists.

Call +91-9811418578 · www.fairfieldhearing.in · New Friends Colony, New Delhi

Disclaimer (Medical, Legal & Trademark)

This article is provided by Fairfield Hearing Clinics for general education and awareness only. It is not medical advice, a diagnosis, a prescription, or a recommendation to buy or use any particular product, brand, model or technology level. It is not a paid or sponsored comparison.

Product names, features, technology levels, specifications, performance claims, trial programmes, pricing and country availability described here are based on publicly available manufacturer announcements and independent industry reporting at the time of writing. These details can change at any time and differ by region, and figures such as battery life or processing power are as reported by the source and may vary in real use. Please confirm current details from official sources or an authorised hearing centre before making any decision.

Hearing aids must be selected, fitted and programmed individually after a proper hearing assessment, and results differ from person to person. Nothing in this article should be used to diagnose or treat any condition, or to delay seeking professional care. For advice about your hearing or the right device for you, please consult a qualified, registered audiologist or an ENT physician who can examine you in person. If you have ear pain, discharge, sudden hearing loss, or hearing loss in one ear, seek prompt professional care.

Trademark note: "Unitron", "Smile", "Moxi", "Insera", "Flex", "Phonak", "Audeo", "Infinio", "Sphere", "DEEPSONIC", "AutoSense", "ERA" and "Sonova" are trademarks of their respective owners. Fairfield Hearing Clinics is an independent hearing care provider and is not affiliated with, authorised by, endorsed by, or sponsored by these companies for the purposes of this article. All names and third-party sources are used only for identification, comparison, commentary and educational purposes.

References & Credits

All information above has been summarised in our own words for easy reading. Full credit belongs to the original authors and publishers listed below. Readers are encouraged to consult the original sources for the latest details.

1. Hearing Health & Technology Matters and The Hearing Review - "Unitron Launches Smile Hearing Aid Platform" (ERA chip, Integra OS, HyperFocus, AI Dome Proposer, Bluetooth, Moxi and Insera models). Link
2. HearingTracker and Phonak / Sonova announcements - Phonak Audeo Sphere Infinio, DEEPSONIC dual-chip architecture, Spheric Speech Clarity 2.0, and the Infinio Ultra update. Link
3. Comparisons of Phonak Infinio and Infinio Sphere, and explanations of technology levels 90/70/50/30 (e.g., Prescription Hearing; Migelino). Link
4. Unitron - FLEX:TRIAL programme, and HearingTracker reporting on try-before-you-buy hearing aid trials. Link
5. Sonova brand information and independent comparisons of Unitron and Phonak as sister brands sharing the ERA platform and receiver systems (e.g., Hears Hearing & Hearables; Sonova). Link

© 2026 Fairfield Hearing Clinics, New Delhi. Prepared for public awareness. Please seek professional care for personal hearing decisions.