# Ref Guide for Essential Oils vs Sisu Longevity Studio

The clearest difference is price: Sisu Longevity Studio at Free against Ref Guide for Essential Oils's $4.99. Sisu Longevity Studio also leads on in-app purchases (none vs 2) and update cadence (fortnightly vs every 3 months). Ref Guide for Essential Oils's advantage is chart position (#40 vs unranked). On ads, device support and iOS requirement there is nothing between them.

Sisu Longevity Studio is free to download; Ref Guide for Essential Oils costs $4.99 up front. Ref Guide for Essential Oils sells 2 in-app purchases, starting at $0.99 per month. Sisu Longevity Studio asks for nothing beyond the download.

Ref Guide for Essential Oils ships an update every 3 months, Sisu Longevity Studio fortnightly. The most recent releases landed on October 13, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Ref Guide for Essential Oils | Sisu Longevity Studio |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.0 (47 ratings)](https://appshunter.io/ios/app/ref-guide-for-essential-oils/id937793199/reviews)** | — |
| Number of ratings | **47** | — |
| Positive reviews | 58.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Freemium | — |
| Best chart rank | **#40** | — |
| Size | 47 MB | 194 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Abundant Health](https://appshunter.io/developer/937793198) | [Sisu Longevity Studio LLC](https://appshunter.io/developer/1896493102) |

## What reviewers say

### Ref Guide for Essential Oils

[App page](https://appshunter.io/ios/app/ref-guide-for-essential-oils/id937793199)

**Currently charting:** #40 Top Paid · Health & Fitness (US App Store)

This app provides a comprehensive guide to essential oils and related products, offering quick information for supporting health and wellness. It includes detailed product information, everyday tips, recipes, and application instructions for hundreds of health conditions.

**Highlights:** Quick on-the-go information, Detailed product information, Everyday tips and recipes, Essential oil application instructions, Search and note-taking, Information on single oils and blends

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Yearly Subscription | $9.99 | per year |

**What reviewers like**

- 📚 Comprehensive essential oil information and reference
- 🔍 Easy search functionality by oil or ailment
- 📱 Convenient portable access without carrying physical books
- ✅ Well-organized and user-friendly interface
- 💡 Detailed information on oil properties and applications

**What reviewers complain about**

- 💰 Unfair pricing model with upfront cost plus subscription fees
- 🔄 Lack of regular updates for new oils and products
- ❌ Outdated product information and discontinued items still listed
- 🐛 Notes section frequently buggy and unreliable
- 🔧 App crashes and black screen issues

**Reported bugs**

- Black screen when opening app or selecting options
- App crashes and stops working after updates
- Notes disappear or move to wrong oil categories
- Notes section doesn't allow text entry
- Contact and bug report links are broken/non-functional

**Requested features**

- Regular updates for new oils and reformulated blends
- Personal inventory tracking system
- Shopping list for oils running low or needed
- Ability to mark favorite oils or oils you own
- Click-through navigation from ailments to specific oils


### Sisu Longevity Studio

[App page](https://appshunter.io/ios/app/sisu-longevity-studio/id6767615111)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ref Guide for Essential Oils free?

Ref Guide for Essential Oils costs $4.99, and also offers in-app purchases.

### Is Sisu Longevity Studio free?

Sisu Longevity Studio is free to download, with no in-app purchases.

### Do Ref Guide for Essential Oils or Sisu Longevity Studio have ads?

Neither Ref Guide for Essential Oils nor Sisu Longevity Studio shows ads.

### Which is updated more often, Ref Guide for Essential Oils or Sisu Longevity Studio?

Ref Guide for Essential Oils ships an update every 3 months, and Sisu Longevity Studio fortnightly. Most recently, Ref Guide for Essential Oils was updated on October 13, 2026 and Sisu Longevity Studio on September 27, 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.*