# Zync AI vs Subly

The clearest difference is in-app purchases: Zync AI at none against Subly's 3. Zync AI also leads on iOS requirement (15.1 vs 17.0). Subly's advantage is update cadence (every 4 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Subly sells 3 in-app purchases, starting at $4.99 per 7 days. Zync AI asks for nothing beyond the download.

Zync AI ships an update every 3 months, Subly every 4 days. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Zync AI | Subly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/subly-subtitle-maker/id6778295353/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 95 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Zync AI Inc](https://appshunter.io/developer/1782854390) | [NTSAUTOSIGA LLC](https://appshunter.io/developer/1896638186) |

## What reviewers say

### Zync AI

[App page](https://appshunter.io/ios/app/zync-ai/id6738907299)

**Features:** macOS Compatibility

**In-app purchases:** none


### Subly

[App page](https://appshunter.io/ios/app/subly-subtitle-maker/id6778295353)

Easily add animated, word-by-word captions and AI-generated narration to your videos. This app processes everything on your device, ensuring privacy and offline functionality. Edit clips, add music, and export in professional formats without recurring fees.

**Highlights:** Word-by-word animated captions, On-device AI narration, Full video editing suite, Offline functionality, One-time purchase, SRT/VTT export, Vertical reframing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Yearly | $29.99 | per year |
| Subly Pro | $39.99 | one-time |


## Frequently asked questions

### Is Zync AI free?

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

### Is Subly free?

Subly is free to download, with in-app purchases available.

### Do Zync AI or Subly have ads?

Neither Zync AI nor Subly shows ads.

### Which is updated more often, Zync AI or Subly?

Zync AI ships an update every 3 months, and Subly every 4 days. Most recently, Zync AI was updated on October 7, 2026 and Subly 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.*