# Evidation vs Nudge by CHAICore

The clearest difference is iOS requirement: Nudge by CHAICore at 14.0 against Evidation's 16.4. On price and in-app purchases there is nothing between them.

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

## The numbers

| Metric | Evidation | Nudge by CHAICore |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (29K ratings)](https://appshunter.io/ios/app/evidation/id793039965/reviews)** | — |
| Number of ratings | **29K** | — |
| Positive reviews | 50.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 3 days | — |
| Monetization | Free | — |
| Size | 74 MB | 32 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | **iPhone** | — |
| 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


### Nudge by CHAICore

[App page](https://appshunter.io/ios/app/nudge-by-chaicore/id1336157419)

**In-app purchases:** none


## Frequently asked questions

### Is Evidation free?

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

### Is Nudge by CHAICore free?

Nudge by CHAICore is free to download, with no in-app purchases.

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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.*