# Сириус vs ES Nails Studio

The clearest difference is update cadence: Сириус at every 2 months against ES Nails Studio's every 40 months. Сириус also leads on iOS requirement (8 vs 13.0). 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.

Сириус ships an update every 2 months, ES Nails Studio every 40 months. The most recent releases landed on September 28, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Сириус | ES Nails Studio |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 40 months |
| Monetization | Free | — |
| Size | 12 MB | 45 MB |
| Requires iOS | **8** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KIDS SECURITY, TOO](https://appshunter.io/developer/1200281331) | [Svetlana Borisova](https://appshunter.io/developer/1494885889) |

## What reviewers say

### Сириус

[App page](https://appshunter.io/ios/app/gps/id1200281332)

This app allows parents to track the real-time location of their children's smartwatches. It offers communication features, movement history, and safety alerts like geofencing and low battery notifications. Parents can also remotely control watch settings and send rewards.

**Highlights:** Real-time location tracking, Two-way messaging (text/voice), Movement history, Geofencing alerts, Remote watch control, Camera support, SOS and safety notifications

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

**In-app purchases:** none


### ES Nails Studio

[App page](https://appshunter.io/ios/app/es-nails-studio/id6444240261)

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

**In-app purchases:** none


## Frequently asked questions

### Is Сириус free?

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

### Is ES Nails Studio free?

ES Nails Studio is free to download, with no in-app purchases.

### Do Сириус or ES Nails Studio have ads?

Neither Сириус nor ES Nails Studio shows ads.

### Which is updated more often, Сириус or ES Nails Studio?

Сириус ships an update every 2 months, and ES Nails Studio every 40 months. Most recently, Сириус was updated on September 28, 2026 and ES Nails Studio on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*