# Lumen vs Reboot66

The clearest difference is review sentiment: Lumen at 73% against Reboot66's 0%. Lumen also leads on rating (4.6 vs 1.5) and ratings volume (6.5K vs 2). Reboot66's advantage is monetization model (free vs free with in-app purchases) and update cadence (weekly vs fortnightly). 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.

Lumen holds the better App Store score, 4.6 against 1.5. That said, the two scores are not equally well evidenced: Lumen has 6.5K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of Lumen's written reviews are positive against 0% of Reboot66's.

Lumen ships an update fortnightly, Reboot66 weekly. The most recent releases landed on October 26, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Lumen | Reboot66 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (6.5K ratings)](https://appshunter.io/ios/app/lumen-metabolic-coach/id1395149502/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/reboot66/id6445857262/reviews) |
| Number of ratings | **6.5K** | 2 |
| Positive reviews | **73.2% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 270 MB | 41 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Metaflow](https://appshunter.io/developer/1030318472) | [O2S1, Inc.](https://appshunter.io/developer/1674301312) |

## What reviewers say

### Lumen

[App page](https://appshunter.io/ios/app/lumen-metabolic-coach/id1395149502)

Gain control of your metabolism with real-time insights and personalized nutrition plans. This app helps you understand if your body is burning fats or carbs, offering guidance on what and when to eat for weight loss and a healthier lifestyle.

**Highlights:** Real-time metabolic insights, Personalized daily nutrition plans, Lifestyle recommendations, Healthy habit building, Progress tracker, Monthly cycle tracker, Community support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Provides real-time insights
- 💡 Helps understand metabolism
- 🚀 Customized recommendations
- 👍 Motivating and educational

**What reviewers complain about**

- 🐛 Inconsistent readings
- 🔍 Limited food database
- 💰 Expensive subscription
- 🔍 Confusing app layout
- 🔍 Lack of integration with other apps

**Reported bugs**

- App crashes and freezes
- Difficulty calibrating the device
- Inaccurate breath measurement detection

**Requested features**

- Ability to edit logged foods and measurements
- Integration with fitness and food tracking apps
- More flexible and personalized carb recommendations
- Improved meal planning and recipe suggestions


### Reboot66

[App page](https://appshunter.io/ios/app/reboot66/id6445857262)

Easily track your daily fitness activities, including progress photos, weight, and body measurements. Stay motivated by competing with friends and sharing your achievements. This app helps transform your fitness journey with its user-friendly interface.

**Highlights:** Daily activity tracking, Progress picture uploads, Weight and body measurements, Friend competition, Motivation reminders, Result sharing

**In-app purchases:** none


## Frequently asked questions

### Is Lumen free?

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

### Is Reboot66 free?

Reboot66 is free to download, with no in-app purchases.

### Which has better reviews, Lumen or Reboot66?

Lumen is rated higher. Lumen averages 4.6 out of 5 from 6.5K ratings, while Reboot66 averages 1.5 from 2 ratings.

### Do Lumen or Reboot66 have ads?

Neither Lumen nor Reboot66 shows ads.

### Which is updated more often, Lumen or Reboot66?

Lumen ships an update fortnightly, and Reboot66 weekly. Most recently, Lumen was updated on October 26, 2026 and Reboot66 on October 13, 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.*