# Evidation vs Co

The clearest difference is review sentiment: Evidation at 50% against Co's 0%. Evidation also leads on rating (4.6 vs 3.3) and update cadence (every 3 days vs every 2 months). Co's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.4). 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.

Evidation holds the better App Store score, 4.6 against 3.3. That said, the two scores are not equally well evidenced: Evidation has 29K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 50% of Evidation's written reviews are positive against 0% of Co's.

Evidation ships an update every 3 days, Co every 2 months. The most recent releases landed on September 30, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Evidation | Co |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (29K ratings)](https://appshunter.io/ios/app/evidation/id793039965/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/co-deo/id1562076177/reviews) |
| Number of ratings | **29K** | 4 |
| Positive reviews | **50.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 74 MB | 57 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Evidation Health, Inc.](https://appshunter.io/developer/793039968) | [QuestionPro.com](https://appshunter.io/developer/735011822) |

## 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


### Co

[App page](https://appshunter.io/ios/app/co-deo/id1562076177)

Participate in weekly surveys, polls, and forum discussions to share your opinions and experiences. Earn points for your engagement, redeemable for gift cards. All data is used for research purposes.

**Highlights:** Weekly exercises, Topics and forums, Online surveys, Quick polls, Earn points, Redeem for gift cards

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Evidation free?

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

### Is Co free?

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

### Which has better reviews, Evidation or Co?

Evidation is rated higher. Evidation averages 4.6 out of 5 from 29K ratings, while Co averages 3.3 from 4 ratings.

### Do Evidation or Co have ads?

Neither Evidation nor Co shows ads.

### Which is updated more often, Evidation or Co?

Evidation ships an update every 3 days, and Co every 2 months. Most recently, Evidation was updated on September 30, 2026 and Co on September 19, 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.*