# Drybar vs TRAPP Diffuser

The clearest difference is update cadence: Drybar at monthly against TRAPP Diffuser's every 12 months. TRAPP Diffuser's advantage is iOS requirement (11.0 vs 14.4). On price, ads, in-app purchases and device support there is nothing between them.

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

Drybar ships an update monthly, TRAPP Diffuser every 12 months. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Drybar | TRAPP Diffuser |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (33 ratings)](https://appshunter.io/ios/app/drybar/id464998465/reviews)** | — |
| Number of ratings | **33** | — |
| Positive reviews | 7.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 12 months |
| Monetization | Free | — |
| Size | 47 MB | 173 MB |
| Requires iOS | 14.4 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Drybar](https://appshunter.io/developer/464998468) | [Dongguan Yih-Teh Electric Products Co., Ltd.](https://appshunter.io/developer/1604523226) |

## What reviewers say

### Drybar

[App page](https://appshunter.io/ios/app/drybar/id464998465)

Book and manage professional blowout appointments at your favorite salon. Discover exclusive app-only promotions, join membership programs, and find style inspiration for your next visit. Rebook services and locations with ease.

**Highlights:** Book blowout appointments, Manage appointments, Exclusive app promotions, Barfly Membership management, Find salon locations, Style inspiration

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to book appointments
- 💡 Ability to rebook with same stylist
- 🎯 Single platform for all booking needs
- ✨ Modern and sleek interface design
- 🔄 Remembers previous appointments

**What reviewers complain about**

- 🐛 Constant login issues and forced re-authentication
- 📱 Unreliable location detection
- 🔄 Doesn't save user preferences despite checkboxes
- ⚠️ Excessive font size and UI scaling problems
- 🔐 Frequent password reset requirements

**Reported bugs**

- Login credentials not recognized despite being correct
- App logs out user every time it's opened
- Password reset emails not being sent
- Server error messages during booking process
- Scrolling issues on date selection screens

**Requested features**

- Face ID or biometric authentication support
- Remember login credentials between sessions
- Show available times across multiple locations simultaneously
- Search appointments by date instead of location
- Save user preferences and settings permanently


### TRAPP Diffuser

[App page](https://appshunter.io/ios/app/trapp-diffuser/id1604523223)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Drybar free?

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

### Is TRAPP Diffuser free?

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

### Do Drybar or TRAPP Diffuser have ads?

Neither Drybar nor TRAPP Diffuser shows ads.

### Which is updated more often, Drybar or TRAPP Diffuser?

Drybar ships an update monthly, and TRAPP Diffuser every 12 months. Most recently, Drybar was updated on October 6, 2026 and TRAPP Diffuser on October 2, 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.*