# Encore by CHAI vs Smile Detection

The clearest difference is ads: Encore by CHAI at none against Smile Detection's shown. Encore by CHAI also leads on iOS requirement (13.0 vs 17.7.2). Smile Detection's advantage is update cadence (every 2 weeks vs every 11 months). On price, 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.

Encore by CHAI ships an update every 11 months, Smile Detection every 2 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Encore by CHAI | Smile Detection |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/encore-by-chai/id1551380303/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 35 MB |
| Requires iOS | **13.0** | 17.7.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [University of North Carolina at Chapel Hill](https://appshunter.io/developer/924947571) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Encore by CHAI

[App page](https://appshunter.io/ios/app/encore-by-chai/id1551380303)

This app supports individuals recovering from vocal cord treatment by tracking vocal ability over 24 weeks. Users complete short surveys and record their voice to monitor progress through visual graphs. It provides health information but advises consulting a doctor for medical decisions.

**Highlights:** Vocal ability tracking, Short surveys, Voice recording, Progress monitoring graphs, 24-week tracking period

**Features:** macOS Compatibility

**In-app purchases:** none


### Smile Detection

[App page](https://appshunter.io/ios/app/smile-detection/id6504737013)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Encore by CHAI free?

Encore by CHAI is free to download, with no in-app purchases.

### Is Smile Detection free?

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

### Do Encore by CHAI or Smile Detection have ads?

Smile Detection shows ads; Encore by CHAI does not.

### Which is updated more often, Encore by CHAI or Smile Detection?

Encore by CHAI ships an update every 11 months, and Smile Detection every 2 weeks. Most recently, Encore by CHAI was updated on November 7, 2026 and Smile Detection on October 30, 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.*