# TKSTAR GPS vs HydraCal

The clearest difference is update cadence: HydraCal at every 4 weeks against TKSTAR GPS's every 53 months. TKSTAR GPS's advantage is iOS requirement (12.0 vs 15.1). 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.

TKSTAR GPS ships an update every 53 months, HydraCal every 4 weeks. The most recent releases landed on October 10, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | TKSTAR GPS | HydraCal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (6 ratings)](https://appshunter.io/ios/app/tkstar-gps/id1508123897/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 53 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 28 MB | 39 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Dongguan Zeke Electronic Science & Technology Co., Ltd](https://appshunter.io/developer/1801922884) | [Daniel Mitchell](https://appshunter.io/developer/1837385073) |

## What reviewers say

### TKSTAR GPS

[App page](https://appshunter.io/ios/app/tkstar-gps/id1508123897)

This application allows for the management of multiple users and provides specific information about devices. It features geofencing capabilities, alert message details, and generates mileage and stop reports.

**Highlights:** Multiple user management, Device specific information, Geofence creation, Alert message details, Mileage reports, Stop reports

**Features:** macOS Compatibility

**In-app purchases:** none


### HydraCal

[App page](https://appshunter.io/ios/app/hydracal/id6751882234)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TKSTAR GPS free?

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

### Is HydraCal free?

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

### Do TKSTAR GPS or HydraCal have ads?

Neither TKSTAR GPS nor HydraCal shows ads.

### Which is updated more often, TKSTAR GPS or HydraCal?

TKSTAR GPS ships an update every 53 months, and HydraCal every 4 weeks. Most recently, TKSTAR GPS was updated on October 10, 2026 and HydraCal on October 28, 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.*