# Smart Device Pro vs Sightly

The clearest difference is in-app purchases: Smart Device Pro at none against Sightly's 2. Smart Device Pro also leads on iOS requirement (12.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Sightly sells 2 in-app purchases, starting at $7.99 per year. Smart Device Pro asks for nothing beyond the download.

Smart Device Pro ships an update every 10 days, Sightly every 5 days. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Smart Device Pro | Sightly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 5 days** |
| Size | 99 MB | 18 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [北京行臻科技有限责任公司](https://appshunter.io/developer/1786133171) | [DiverAxis Technology (Chengdu) Co., Ltd.](https://appshunter.io/developer/6775443517) |

## What reviewers say

### Smart Device Pro

[App page](https://appshunter.io/ios/app/smart-device-pro/id6739577446)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sightly

[App page](https://appshunter.io/ios/app/sightly-myopia-tracker/id6775443515)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sightly Plus Yearly | $7.99 | per year |
| Sightio Plus Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Smart Device Pro free?

Smart Device Pro is free to download, with no in-app purchases.

### Is Sightly free?

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

### Do Smart Device Pro or Sightly have ads?

Neither Smart Device Pro nor Sightly shows ads.

### Which is updated more often, Smart Device Pro or Sightly?

Smart Device Pro ships an update every 10 days, and Sightly every 5 days. Most recently, Smart Device Pro was updated on September 30, 2026 and Sightly on October 1, 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.*