# Lumen vs CoolFirePD

The clearest difference is review sentiment: Lumen at 73% against CoolFirePD's 0%. Lumen also leads on rating (4.6 vs 1.0) and ratings volume (6.5K vs 2). CoolFirePD's advantage is monetization model (free vs free with in-app purchases) and update cadence (every 5 days 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 1.0. 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 CoolFirePD's.

Lumen ships an update fortnightly, CoolFirePD every 5 days. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Lumen | CoolFirePD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (6.5K ratings)](https://appshunter.io/ios/app/lumen-metabolic-coach/id1395149502/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/coolfirepd/id1637201092/reviews) |
| Number of ratings | **6.5K** | 2 |
| Positive reviews | **73.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 270 MB | 56 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Metaflow](https://appshunter.io/developer/1030318472) | [New York Standard Watch Company, LLC](https://appshunter.io/developer/828885617) |

## 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


### CoolFirePD

[App page](https://appshunter.io/ios/app/coolfirepd/id1637201092)

This app works with a compatible pedometer to track your daily steps, calories burned, and other health metrics. It seamlessly syncs this data with your device's health platform for a comprehensive overview of your activity.

**Highlights:** Step counting, Calorie tracking, Health data synchronization, Activity monitoring, Pedometer pairing

**In-app purchases:** none


## Frequently asked questions

### Is Lumen free?

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

### Is CoolFirePD free?

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

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

Lumen is rated higher. Lumen averages 4.6 out of 5 from 6.5K ratings, while CoolFirePD averages 1.0 from 2 ratings.

### Do Lumen or CoolFirePD have ads?

Neither Lumen nor CoolFirePD shows ads.

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

Lumen ships an update fortnightly, and CoolFirePD every 5 days. Most recently, Lumen was updated on November 1, 2026 and CoolFirePD on October 24, 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.*