# TRAPP Diffuser vs Outfit Formulas

The clearest difference is in-app purchases: TRAPP Diffuser at none against Outfit Formulas's 15. TRAPP Diffuser also leads on ads (none vs shown) and iOS requirement (11.0 vs 16.0). Outfit Formulas's advantage is update cadence (every 4 days vs every 12 months). On price and device support there is nothing between them.

Both are free to download. Outfit Formulas sells 15 in-app purchases, starting at $7.99 per 7 days. TRAPP Diffuser asks for nothing beyond the download.

TRAPP Diffuser ships an update every 12 months, Outfit Formulas every 4 days. The most recent releases landed on September 15, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | TRAPP Diffuser | Outfit Formulas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (1.2K ratings)](https://appshunter.io/ios/app/outfit-formulas/id6447664832/reviews)** |
| Number of ratings | — | **1.2K** |
| Positive reviews | — | 66.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 173 MB | 137 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dongguan Yih-Teh Electric Products Co., Ltd.](https://appshunter.io/developer/1604523226) | [GYPO LLC.](https://appshunter.io/developer/1682187324) |

## What reviewers say

### TRAPP Diffuser

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Outfit Formulas

[App page](https://appshunter.io/ios/app/outfit-formulas/id6447664832)

Receive monthly shopping lists to build a versatile wardrobe, focusing on classic staples and seasonal trends. Easily get dressed daily with provided outfit formulas and a shopping directory for curated pieces. Personalize your style with flexible formula suggestions.

**Highlights:** Monthly curated shopping lists, Interactive shopping directory, Daily outfit calendar with formulas, Closet staple curation, Personalized styling options, Outfit logging

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Membership | $7.99 | per 7 days |
| AP_mo_19_fty | $19.00 | per month |
| Monthly_14t | $19.99 | per month |
| 3 months plan | $24.99 | per 3 months |
| Monthly subscription OF | $24.99 | per month |
| Annual Outfit Formulas 50 | $49.99 | per year |
| Annual 79.99 | $79.99 | per year |
| Annual 79 | $79.99 | per year |
| annual_14_trial | $99.99 | per year |
| 1 Year Subscription BF | $99.99 | per year |
| Annual Subscription | $99.99 | per year |
| Annual Subscription | $109.99 | per year |
| outfit_yearly | $190.00 | per year |
| lifetime 199 | $199.99 | one-time |
| Lifetime access to Outfit Formulas | $249.99 | one-time |

**What reviewers like**

- 👍 Easy to use app
- 🚀 Simplifies getting dressed
- 💡 Helpful for building a capsule wardrobe
- 👍 Provides style inspiration
- 👍 Customizable outfit options

**What reviewers complain about**

- 🐛 Login/subscription issues
- 🌍 Lack of personalization options
- 💰 Expensive subscription
- 🌍 Limited Canadian content

**Reported bugs**

- Login screen freezes
- Subscription not recognized in app

**Requested features**

- Ability to customize monthly calendar
- Option to track and log outfits worn
- More personalization based on user's style preferences


## Frequently asked questions

### Is TRAPP Diffuser free?

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

### Is Outfit Formulas free?

Outfit Formulas is free to download, with in-app purchases available.

### Do TRAPP Diffuser or Outfit Formulas have ads?

Outfit Formulas shows ads; TRAPP Diffuser does not.

### Which is updated more often, TRAPP Diffuser or Outfit Formulas?

TRAPP Diffuser ships an update every 12 months, and Outfit Formulas every 4 days. Most recently, TRAPP Diffuser was updated on September 15, 2026 and Outfit Formulas on September 26, 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.*