# PLC Schedule vs Sonu

The clearest difference is rating: Sonu at 4.4 against PLC Schedule's 4.0. Sonu also leads on ratings volume (232 vs 4) and monetization model (free vs ad-supported). PLC Schedule's advantage is iOS requirement (16.0 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Sonu holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Sonu has 232 ratings behind it against 4, so its average is the more settled of the two.

PLC Schedule ships an update monthly, Sonu every 3 weeks. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | PLC Schedule | Sonu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/plc-schedule/id1367545601/reviews) | **[4.4 (232 ratings)](https://appshunter.io/ios/app/sonu/id1597730467/reviews)** |
| Number of ratings | 4 | **232** |
| Positive reviews | — | 73.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 192 MB | 209 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [FLORIDA PRITIKIN CENTER, INC](https://appshunter.io/developer/1403485851) | [Sound Health Systems, Inc.](https://appshunter.io/developer/1500011226) |

## What reviewers say

### PLC Schedule

[App page](https://appshunter.io/ios/app/plc-schedule/id1367545601)

Access your personal schedule, view class offerings, and book additional services. This app helps you manage your time and access Pritikin program information conveniently from your device.

**Highlights:** View Pritikin schedule, Manage personal appointments, Request a la carte services, View ongoing promotions, Access program information

**Features:** macOS Compatibility, Apple Wallet, Vision Pro support

**In-app purchases:** none


### Sonu

[App page](https://appshunter.io/ios/app/sonu/id1597730467)

This app offers personalized, drug-free acoustic resonance therapy for nasal congestion relief. It uses AI and facial scanning to tailor treatments, delivered via a separate wearable band. Track your progress and enjoy convenient, at-home therapy sessions.

**Highlights:** Personalized acoustic resonance therapy, Drug-free treatment, AI-enhanced facial scanning, Bluetooth connectivity, Treatment session tracking, Micro vibration options

**In-app purchases:** none

**What reviewers like**

- 👍 Product works well
- 👍 Drug-free congestion relief
- 👍 Effective for sinus issues
- 👍 Helps with breathing
- 👍 Revolutionary technology

**What reviewers complain about**

- 🐛 App has declined
- 🐛 New app confusing
- 🐛 Old features gone
- 🐛 Core functionality buried
- 🐛 Difficult to use (new app)

**Reported bugs**

- Infinite login loop
- App locks after session end
- Bluetooth connection issues
- Offline mode non-functional
- Cannot end session

**Requested features**

- Bring back old features
- Provide battery life indicator
- Add warning for high audio
- Restore alignment check
- Allow disconnection from band


## Frequently asked questions

### Is PLC Schedule free?

PLC Schedule is free to download, with no in-app purchases.

### Is Sonu free?

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

### Which has better reviews, PLC Schedule or Sonu?

Sonu is rated higher. PLC Schedule averages 4.0 out of 5 from 4 ratings, while Sonu averages 4.4 from 232 ratings.

### Do PLC Schedule or Sonu have ads?

Neither PLC Schedule nor Sonu shows ads.

### Which is updated more often, PLC Schedule or Sonu?

PLC Schedule ships an update monthly, and Sonu every 3 weeks. Most recently, PLC Schedule was updated on October 2, 2026 and Sonu on October 10, 2026.

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