# Synchro Watch vs NB Glasses

The clearest difference is update cadence: NB Glasses at weekly against Synchro Watch's every 4 months. Synchro Watch's advantage is iOS requirement (9.0 vs 14.0). 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.

Synchro Watch ships an update every 4 months, NB Glasses weekly. The most recent releases landed on October 18, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Synchro Watch | NB Glasses |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 23 MB | 70 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [建松 陈](https://appshunter.io/developer/1556383531) | [Shanghai PalmZen Wireless Technology Co.,Ltd](https://appshunter.io/developer/441512718) |

## What reviewers say

### Synchro Watch

[App page](https://appshunter.io/ios/app/synchro-watch/id1450153697)

**Features:** macOS Compatibility

**In-app purchases:** none


### NB Glasses

[App page](https://appshunter.io/ios/app/nb-glasses/id6784565551)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Synchro Watch free?

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

### Is NB Glasses free?

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

### Do Synchro Watch or NB Glasses have ads?

Neither Synchro Watch nor NB Glasses shows ads.

### Which is updated more often, Synchro Watch or NB Glasses?

Synchro Watch ships an update every 4 months, and NB Glasses weekly. Most recently, Synchro Watch was updated on October 18, 2026 and NB Glasses on October 24, 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.*