I have both the Phonak Sphere i90 and the Starkey Edge AI 24s. I got them around the same time. I bought the Starkeys from a local audiologist when I first needed hearing aids. I bought the Phonaks from Injoy Hearing about a month later. I purchased the Phonak’s because I wanted a more affordable backup set. I primarily wear the Starkeys during the week and the Phonaks on weekends—but if I forget to charge one pair, I’ll swap to the other.
Here’s my experience with both:
Tuning is everything.
My local audiologist tuned my Starkeys in person. Injoy tuned my Phonaks remotely. Both did a great job. I’ve only needed a couple of minor adjustments since the initial setup. Just give the person tuning them the feedback to meet your needs!
Your own voice will sound different at first.
One thing that took getting used to was hearing my own voice enhanced. It was distracting, especially during presentations. But after a few tweaks—and a little time—it’s much better.
Battery life is solid.
I typically wear mine 14–16 hours a day in mixed environments: quiet office, loud spaces, etc. At the end of the day:
Starkeys: about 30% battery left
Phonaks: about 50% battery left
Both will easily last a full day, even with late meetings.
Example: Yesterday, I was at work by 7am and my last meeting was over with at 8pm. Work + non-work commitments.
Size and comfort.
The Starkeys have a smaller behind-the-ear profile and are less noticeable—especially important for me since I have short hair. The Phonaks stick out a bit more, but it’s not a dealbreaker. Honestly, the smaller, more discreet design is a big reason I prefer the Starkeys. Some of that size difference comes from the battery and the AI chip(s) inside.
About the AI modes…
I generally avoid using the AI modes unless I really need them. Both devices will “learn” your environment in AI mode, but over time I feel like they start picking up background noises I don’t care about. It’s like they start second-guessing what I want to hear. The longer I stay in AI mode (2+ hours), the worse the sound balance feels to me.
That said—the AI mode does help in really noisy settings. Example: in an echoey meeting room or restaurant, it helps me zero in on the person I’m talking to. Since you’re an educator, I imagine lunch or recess duty could benefit from that feature. I’ve definitely used AI mode in loud school cafeterias to filter out the chaos and catch the conversations that matter.
Bluetooth quirks.
Still working through some Bluetooth issues. Sometimes I have to turn Bluetooth off on my phone or other paired devices. If I forget, and my phone rings, it automatically lowers the hearing aid volume in preparation for the call or alert—which can be really distracting, especially in the middle of a conversation or meeting. Thankfully, I can manage this from the phone, not the hearing aids themselves.
That said, it is nice when I’m expecting a call and hear who’s calling without even looking at my phone—especially during those meetings that should’ve just been an email.
Connectivity bonuses.
I like that the Starkey’s support Auracast and Bluetooth LE (BLE)—super easy to connect. If you want to pair with a computer, I highly recommend the FlooGoo FMA120 USB adapter. The Phonaks use standard Bluetooth and also work great with the FlooGoo. Most modern phones (iPhone, Galaxy) support BLE too.
Bottom line:
You really can’t go wrong with either. Both have great sound quality once tuned properly and both will take a little time to adjust to.
If battery life is your top priority, I’d lean Phonak. But for me, both easily make it through a 16-hour day.
If I could leave you with one key takeaway: get them programmed by a qualified professional (whether local or online). A good fitting makes all the difference—and they can (and should) be fine-tuned over time as you adjust.