# Evidation vs Traffic Light Log by CHAICore

The clearest difference is rating: Traffic Light Log by CHAICore at 5.0 against Evidation's 4.6. Traffic Light Log by CHAICore also leads on iOS requirement (14.0 vs 16.4). Evidation's advantage is update cadence (every 3 days vs every 2 months) and ratings volume (29K vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Traffic Light Log by CHAICore holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Evidation has 29K ratings behind it against 1, so its average is the more settled of the two.

Evidation ships an update every 3 days, Traffic Light Log by CHAICore every 2 months. The most recent releases landed on October 27, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Evidation | Traffic Light Log by CHAICore |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (29K ratings)](https://appshunter.io/ios/app/evidation/id793039965/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/traffic-light-log-by-chaicore/id1594278453/reviews)** |
| Number of ratings | **29K** | 1 |
| Positive reviews | 49.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 73 MB | 31 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Evidation Health, Inc.](https://appshunter.io/developer/793039968) | [University of North Carolina at Chapel Hill](https://appshunter.io/developer/924947571) |

## What reviewers say

### Evidation

[App page](https://appshunter.io/ios/app/evidation/id793039965)

Earn rewards for healthy actions like walking and exercising. Contribute to medical research by securely sharing your health data. Track your progress and sync with popular fitness apps and wearables.

**Highlights:** Earn rewards for health actions, Participate in health research, Track and sync health data, Personalized health insights, Health dashboard, Answer health surveys

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💰 Earn money for healthy activities
- 📊 Tracks various health metrics
- 🤝 Helps with medical research
- 🏅 Motivates users to be more active

**What reviewers complain about**

- 🐢 Slow points accumulation
- 🔍 Inaccurate sync with fitness apps
- 🤖 Poor customer service
- 🤷‍♀️ Confusing point system changes

**Reported bugs**

- Missing activity data
- Inconsistent point calculations
- Login and sign-out issues

**Requested features**

- More frequent reward payouts
- Improved app syncing and data accuracy
- Expanded survey and study opportunities
- Customizable point tracking and goals


### Traffic Light Log by CHAICore

[App page](https://appshunter.io/ios/app/traffic-light-log-by-chaicore/id1594278453)

This wellness app helps you monitor your food consumption by categorizing meals into red, yellow, and green. It provides nutritional information for each food item, promoting healthier eating habits.

**Highlights:** Food intake tracking, Nutritional information, Red, yellow, green food categories, Wellness monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Evidation free?

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

### Is Traffic Light Log by CHAICore free?

Traffic Light Log by CHAICore is free to download, with no in-app purchases.

### Which has better reviews, Evidation or Traffic Light Log by CHAICore?

Traffic Light Log by CHAICore is rated higher. Evidation averages 4.6 out of 5 from 29K ratings, while Traffic Light Log by CHAICore averages 5.0 from 1 ratings.

### Do Evidation or Traffic Light Log by CHAICore have ads?

Neither Evidation nor Traffic Light Log by CHAICore shows ads.

### Which is updated more often, Evidation or Traffic Light Log by CHAICore?

Evidation ships an update every 3 days, and Traffic Light Log by CHAICore every 2 months. Most recently, Evidation was updated on October 27, 2026 and Traffic Light Log by CHAICore on October 19, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*