# ENGAGE vs Sonolex

The clearest difference is update cadence: Sonolex at weekly against ENGAGE's every 2 months. 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.

ENGAGE ships an update every 2 months, Sonolex weekly. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ENGAGE | Sonolex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/engage-hf/id6444870481/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | — |
| Size | 70 MB | 8 MB |
| Requires iOS | 17.4 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Stanford University](https://appshunter.io/developer/292922032) | [Shalinder Singh](https://appshunter.io/developer/6774460940) |

## What reviewers say

### ENGAGE

[App page](https://appshunter.io/ios/app/engage-hf/id6444870481)

This app helps participants in a heart failure research study manage their condition. It allows users to track vitals, medication adherence, and health status, providing insights for personalized care and improved well-being. Educational resources and a health summary feature further support users in their heart health journey.

**Highlights:** Daily and two-week check-ins, Vitals tracking (blood pressure, heart rate, weight), Medication adherence monitoring, Health status questionnaires (KCCQ-12, dizziness), Engagement score for motivation, Health summary PDF sharing, Educational videos on heart failure management

**Features:** macOS Compatibility

**In-app purchases:** none


### Sonolex

[App page](https://appshunter.io/ios/app/sonolex/id6774460938)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ENGAGE free?

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

### Is Sonolex free?

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

### Do ENGAGE or Sonolex have ads?

Neither ENGAGE nor Sonolex shows ads.

### Which is updated more often, ENGAGE or Sonolex?

ENGAGE ships an update every 2 months, and Sonolex weekly. Most recently, ENGAGE was updated on October 7, 2026 and Sonolex on October 8, 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.*