# RespiRelax+ vs 세라젬 IoT

The clearest difference is review sentiment: RespiRelax+ at 70% against 세라젬 IoT's 10%. 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.

RespiRelax+ ships an update every 3 weeks, 세라젬 IoT every 5 weeks. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | RespiRelax+ | 세라젬 IoT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (16 ratings)](https://appshunter.io/ios/app/respirelax-plus/id515900420/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | **69.6% of reviews** | 10.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free | Free |
| Size | 84 MB | 50 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Les Thermes d'Allevard](https://appshunter.io/developer/515900423) | [(주)세라젬](https://appshunter.io/developer/1263365098) |

## What reviewers say

### RespiRelax+

[App page](https://appshunter.io/ios/app/respirelax-plus/id515900420)

Improve your breathing and manage stress with guided exercises. This app offers personalized programs and offline functionality for consistent practice, promoting well-being and cardiac coherence.

**Highlights:** Personalized breathing programs, Stress management exercises, Cardiac coherence training, Offline practice mode, Adjustable session duration, Soothing visual and sound environments

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

**In-app purchases:** none

**What reviewers like**

- ✨ Effective for anxiety management
- 🧘‍♀️ Calming and relaxing experience
- 👍 Simple and intuitive interface
- 🆓 Free to use
- 🔒 Respects data privacy

**What reviewers complain about**

- 🎶 Old music preferred by many
- 🔔 Aggressive end-of-session sound
- 🔊 Sound issues reported
- 📱 Lack of Apple Watch integration
- 🎨 New design less appealing to some

**Reported bugs**

- Custom session timing not constant
- Progressive sound option disappeared
- Sound settings not remembered
- Customization option not functional
- Cannot use with headphones

**Requested features**

- Apple Watch integration
- Customizable hold/apnea phases
- Ability to combine sessions
- Add duration of apnea for experts
- Calendar/progress tracking


### 세라젬 IoT

[App page](https://appshunter.io/ios/app/iot/id1578650525)

Control your medical devices remotely and enjoy healing sounds for relaxation. Monitor your spine health directly from your smartphone. Enhance your wellness experience with smart connectivity.

**Highlights:** Remote device control, Spine monitoring, Healing sound library, Smart connectivity, Notifications

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

**In-app purchases:** none


## Frequently asked questions

### Is RespiRelax+ free?

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

### Is 세라젬 IoT free?

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

### Do RespiRelax+ or 세라젬 IoT have ads?

Neither RespiRelax+ nor 세라젬 IoT shows ads.

### Which is updated more often, RespiRelax+ or 세라젬 IoT?

RespiRelax+ ships an update every 3 weeks, and 세라젬 IoT every 5 weeks. Most recently, RespiRelax+ was updated on October 21, 2026 and 세라젬 IoT on October 7, 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.*