# Built With Science+ vs Delta

The clearest difference is in-app purchases: Delta at none against Built With Science+'s 4. Delta also leads on review sentiment (100% vs 80%). Built With Science+'s advantage is ratings volume (4.8K vs 1) and device support (3 vs 1). On price, rating, ads and iOS requirement there is nothing between them.

Both are free to download. Built With Science+ sells 4 in-app purchases, starting at $29.99 per month. Delta asks for nothing beyond the download.

Delta holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Built With Science+ has 4.8K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 80% of Built With Science+'s written reviews are positive against 100% of Delta's.

## The numbers

| Metric | Built With Science+ | Delta |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4.8K ratings)](https://appshunter.io/ios/app/built-with-science-plus/id6446000532/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/delta-adaptive-age/id6797852506/reviews)** |
| Number of ratings | **4.8K** | 1 |
| Positive reviews | 79.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Subscription | **Free** |
| Size | 235 MB | 86 MB |
| Requires iOS | **16.2** | 16.4 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Built With Science Holdings Corp](https://appshunter.io/developer/1559732895) | [Vulti Holdings Limited](https://appshunter.io/developer/1841760234) |

## What reviewers say

### Built With Science+

[App page](https://appshunter.io/ios/app/built-with-science-plus/id6446000532)

This intelligent fitness companion offers personalized workout plans and nutrition advice based on scientific insights. It adapts to your progress with real-time feedback, providing guidance for continuous gains and informed health decisions.

**Highlights:** Hyper-Personalized Workouts, Progressive Overload Guidance, Real-Time Diet Adjustments, AI-Powered Meal Scanner, 250+ Exercise Tutorials, Daily Knowledge Boosters, AI Fitness & Nutrition Assistant

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Membership | $29.99 | per month |
| Annual Membership | $189.00 | per year |
| Intermediate Program Unlock | $49.00 | one-time |
| Beginner Program Unlock | $49.00 | one-time |

**What reviewers like**

- 👍 Comprehensive fitness and nutrition tracking
- 🚀 Convenient all-in-one app
- 📚 Helpful educational lessons
- 💪 Science-backed program
- 🎯 Customized and adaptive workouts

**What reviewers complain about**

- 🐛 Occasional performance issues and bugs
- 🔍 Limited food database and recipe options
- 📱 Lack of integration with other fitness apps and devices
- 🕰️ Inflexible workout scheduling
- 💬 Limited human interaction and coaching support

**Reported bugs**

- Workout data sometimes gets lost or marked incomplete
- App takes a long time to open
- Login and sign-up issues for existing customers
- Inconsistent exercise recommendations and adjustments

**Requested features**

- Add ability to create and save custom recipes
- Integrate with Apple Health and other fitness platforms
- Provide more flexibility in workout scheduling
- Enhance human coaching and support features
- Improve performance and stability


### Delta

[App page](https://appshunter.io/ios/app/delta-adaptive-age/id6797852506)

This app helps you centralize and understand your health data, including lab reports, fitness, nutrition, and sleep. It analyzes your lab results and calculates an 'Adaptive Age' based on a published formula, providing a comprehensive view of your wellness.

**Highlights:** Reads lab reports from photos or PDFs, Calculates Adaptive Age using a published formula, Tracks history of health markers, Integrates with Apple Health, Logs meals, training, and hydration, Private by design with no account required

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Built With Science+ free?

Built With Science+ is free to download, with in-app purchases available.

### Is Delta free?

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

### Which has better reviews, Built With Science+ or Delta?

Delta is rated higher. Built With Science+ averages 4.8 out of 5 from 4.8K ratings, while Delta averages 5.0 from 1 ratings.

### Do Built With Science+ or Delta have ads?

Neither Built With Science+ nor Delta shows ads.

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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.*