# Fastrack Smart World vs Gritzo

The clearest difference is review sentiment: Gritzo at 57% against Fastrack Smart World's 22%. Gritzo also leads on rating (4.8 vs 4.5). Fastrack Smart World's advantage is ratings volume (1.1K vs 30). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Gritzo holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Fastrack Smart World has 1.1K ratings behind it against 30, so its average is the more settled of the two. Written reviews point the same way: 22% of Fastrack Smart World's written reviews are positive against 57% of Gritzo's.

Fastrack Smart World ships an update fortnightly, Gritzo every 10 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fastrack Smart World | Gritzo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (1.1K ratings)](https://appshunter.io/ios/app/fastrack-smart-world/id1508265074/reviews) | **[4.8 (30 ratings)](https://appshunter.io/ios/app/gritzo/id6472877680/reviews)** |
| Number of ratings | **1.1K** | 30 |
| Positive reviews | 21.9% of reviews | **56.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 10 days** |
| Monetization | Free | Free |
| Size | 754 MB | 136 MB |
| Requires iOS | 16 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Titan Company Limited](https://appshunter.io/developer/964406127) | [Bright Lifecare Private LTD](https://appshunter.io/developer/995933851) |

## What reviewers say

### Fastrack Smart World

[App page](https://appshunter.io/ios/app/fastrack-smart-world/id1508265074)

This app pairs with your Fastrack Reflex smart wearable to manage settings, update firmware, and sync health data like steps, sleep, and heart rate. It offers features like 'Find my Watch' and integrates with Apple Health. Access to all functionalities requires a Bluetooth connection to your wearable.

**Highlights:** Connect/disconnect smartwatches, Software/firmware updates, Personalize settings, Sync health data (steps, sleep, heart rate), Find my Watch, Apple Health integration

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Good
- 🚀 Excellent
- 👍 Nice

**What reviewers complain about**

- 🐛 Buggy
- 🐛 Connection problem
- 🐛 Crash
- 🐛 Auto close
- 🐛 Firmware update failed

**Reported bugs**

- Firmware update failed
- Not opening app
- OTP not working
- Software doesn't update
- Tracking data doesn't sync

**Requested features**

- More watch faces
- Add more customizability
- Improve app and watch compatibility


### Gritzo

[App page](https://appshunter.io/ios/app/gritzo/id6472877680)

This app offers personalized nutritional drinks for children, focusing on height, weight, and immunity. Parents can discover products tailored to their child's age, gender, and growth needs, with exclusive offers and a seamless shopping experience.

**Highlights:** Personalized nutrition recommendations, Goal-based product selection, Height, weight, and immunity support, Exclusive app offers and discounts, User-friendly interface, Secure payment gateway

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

**In-app purchases:** none


## Frequently asked questions

### Is Fastrack Smart World free?

Fastrack Smart World is free to download, with no in-app purchases.

### Is Gritzo free?

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

### Which has better reviews, Fastrack Smart World or Gritzo?

Gritzo is rated higher. Fastrack Smart World averages 4.5 out of 5 from 1.1K ratings, while Gritzo averages 4.8 from 30 ratings.

### Do Fastrack Smart World or Gritzo have ads?

Neither Fastrack Smart World nor Gritzo shows ads.

### Which is updated more often, Fastrack Smart World or Gritzo?

Fastrack Smart World ships an update fortnightly, and Gritzo every 10 days. Most recently, Fastrack Smart World was updated on November 3, 2026 and Gritzo on October 30, 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.*