# Nano SigmaPlus vs OIDO Hearing

The clearest difference is rating: OIDO Hearing at 5.0 against Nano SigmaPlus's 4.0. OIDO Hearing also leads on update cadence (every 3 weeks vs every 7 months) and review sentiment (100% vs 85%). Nano SigmaPlus's advantage is ratings volume (82 vs 4) and iOS requirement (9.0 vs 12.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OIDO Hearing holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Nano SigmaPlus has 82 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 85% of Nano SigmaPlus's written reviews are positive against 100% of OIDO Hearing's.

Nano SigmaPlus ships an update every 7 months, OIDO Hearing every 3 weeks. The most recent releases landed on October 16, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Nano SigmaPlus | OIDO Hearing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (82 ratings)](https://appshunter.io/ios/app/nano-sigmaplus/id1483291641/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/oido-hearing/id6476654839/reviews)** |
| Number of ratings | **82** | 4 |
| Positive reviews | 84.9% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 70 MB | 14 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xiamen NewSound Technology Co., Ltd.](https://appshunter.io/developer/1174641815) | [Xiamen Vienatone Medical Technology Co., Ltd](https://appshunter.io/developer/1124039917) |

## What reviewers say

### Nano SigmaPlus

[App page](https://appshunter.io/ios/app/nano-sigmaplus/id1483291641)

Connect and control your hearing aids with this application. Adjust volume, program modes, and band equalizers for a personalized listening experience.

**Highlights:** Connect to Nano Hearing Aids, Adjust Volume, Change Program Mode, Customize Band Equalizers, Personalized Hearing Experience

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and navigate
- 🚀 Quick and easy Bluetooth connection
- 💡 Customizable volume and sound modes
- ✨ Simple and clean user interface
- 😊 Helpful for hearing loss

**What reviewers complain about**

- 📉 Removed/changed features
- 🔋 Battery life not as advertised
- 🎛️ Left and right adjustments sync
- 🚫 Cannot turn off hearing aids from app
- ❓ Manual doesn't match app features

**Reported bugs**

- App crashes
- Hearing aids stopped working
- Glitchy and unclear app

**Requested features**

- Restore hearing test feature
- Bring back charge level display
- Allow independent left/right adjustment
- Enable turning off hearing aids from app
- Add AirPods compatibility


### OIDO Hearing

[App page](https://appshunter.io/ios/app/oido-hearing/id6476654839)

This application allows users to remotely manage their hearing aids. Adjust volume, switch programs, modify sensitivity, and control noise reduction. It also provides battery status and connection information.

**Highlights:** Remote hearing aid control, Volume adjustment, Program switching, Sensitivity adjustment, Feedback and noise reduction, Listening tests, Battery status check

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nano SigmaPlus free?

Nano SigmaPlus is free to download, with no in-app purchases.

### Is OIDO Hearing free?

OIDO Hearing is free to download, with no in-app purchases.

### Which has better reviews, Nano SigmaPlus or OIDO Hearing?

OIDO Hearing is rated higher. Nano SigmaPlus averages 4.0 out of 5 from 82 ratings, while OIDO Hearing averages 5.0 from 4 ratings.

### Do Nano SigmaPlus or OIDO Hearing have ads?

Neither Nano SigmaPlus nor OIDO Hearing shows ads.

### Which is updated more often, Nano SigmaPlus or OIDO Hearing?

Nano SigmaPlus ships an update every 7 months, and OIDO Hearing every 3 weeks. Most recently, Nano SigmaPlus was updated on October 16, 2026 and OIDO Hearing on September 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*