# Built With Science+ vs Ninety

The clearest difference is ads: Built With Science+ at none against Ninety's shown. Built With Science+ also leads on update cadence (fortnightly vs every 3 months) and device support (3 vs 1). On price, in-app purchases 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 and Ninety sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Built With Science+ ships an update fortnightly, Ninety every 3 months. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Built With Science+ | Ninety |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.4K ratings)](https://appshunter.io/ios/app/built-with-science-plus/id6446000532/reviews)** | — |
| Number of ratings | **5.4K** | — |
| Positive reviews | 80.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 269 MB | 44 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Built With Science Holdings Corp](https://appshunter.io/developer/1559732895) | [Alexis Raimbault](https://appshunter.io/developer/1695318313) |

## 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 and nutrition plans based on scientific research. It adapts to your progress with real-time adjustments and provides detailed exercise tutorials and AI-powered meal scanning to help you achieve your body goals.

**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


### Ninety

[App page](https://appshunter.io/ios/app/ninety-90-day-challenge/id6766645333)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ninety Premium Monthly | $6.99 | per month |
| Ninety Premium Yearly | $44.99 | per year |


## Frequently asked questions

### Is Built With Science+ free?

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

### Is Ninety free?

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

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

Ninety shows ads; Built With Science+ does not.

### Which is updated more often, Built With Science+ or Ninety?

Built With Science+ ships an update fortnightly, and Ninety every 3 months. Most recently, Built With Science+ was updated on November 9, 2026 and Ninety on November 5, 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.*