# HDOR vs Smart Sync

The clearest difference is rating: HDOR at 3.4 against Smart Sync's 1.0. HDOR also leads on update cadence (fortnightly vs every 2 months) and review sentiment (48% vs 26%). Smart Sync's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, 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.

HDOR holds the better App Store score, 3.4 against 1.0. That said, the two scores are not equally well evidenced: HDOR has 22 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 48% of HDOR's written reviews are positive against 26% of Smart Sync's.

HDOR ships an update fortnightly, Smart Sync every 2 months. The most recent releases landed on November 12, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | HDOR | Smart Sync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (22 ratings)](https://appshunter.io/ios/app/hdor/id1474792770/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/smart-sync/id1558408956/reviews) |
| Number of ratings | **22** | 2 |
| Positive reviews | **48.1% of reviews** | 26.4% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 123 MB | 90 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Procam International Private Limited](https://appshunter.io/developer/6801762639) | [Titan Company Limited](https://appshunter.io/developer/964406127) |

## What reviewers say

### HDOR

[App page](https://appshunter.io/ios/app/hdor/id1474792770)

This app encourages consistent physical activity through a 100-day challenge. It focuses on building healthy habits and community support for participants of all fitness levels. Track your progress, celebrate achievements, and become part of a global movement.

**Highlights:** 100-day fitness challenge, Builds consistent activity habits, Community support and motivation, Track personal progress, Celebrate milestones, Global participation

**In-app purchases:** none


### Smart Sync

[App page](https://appshunter.io/ios/app/smart-sync/id1558408956)

This app syncs with Titan smartwatches to track daily activity, heart rate, and SpO2. It monitors sleep patterns, manages notifications, and offers features like female health tracking and Alexa integration. Stay connected and manage your well-being effortlessly.

**Highlights:** Activity tracking and progress trends, Heart rate and SpO2 monitoring, Sleep data synchronization, App notification customization, Female health tracking, Alexa, Phone Finder, Music/Camera control, Sedentary and hydration reminders

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

**In-app purchases:** none

**What reviewers like**

- 👍 Good value for money
- 👍 User-friendly interface
- 👍 Nice watch faces
- 👍 Good battery backup
- 👍 Smooth app performance

**What reviewers complain about**

- 🐛 App crashing frequently
- 🐛 Pairing issues with iOS
- 🐛 Watch not scanning QR code
- 🐛 App gets stuck during scan
- 🐛 Connectivity issues

**Reported bugs**

- App keeps crashing after dashboard opens
- Unable to scan Titan watch
- Watch not pairing again after unpairing on iOS
- App not connecting to phone after unpairing
- App shows connected to phone but phone shows disconnected

**Requested features**

- Update the app for updated software
- Provide a guide for QR code on watch
- More robust and feature-rich watch
- More watch faces with all information
- Improve watch face design to show time, date, battery, steps, HR


## Frequently asked questions

### Is HDOR free?

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

### Is Smart Sync free?

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

### Which has better reviews, HDOR or Smart Sync?

HDOR is rated higher. HDOR averages 3.4 out of 5 from 22 ratings, while Smart Sync averages 1.0 from 2 ratings.

### Do HDOR or Smart Sync have ads?

HDOR shows ads; Smart Sync does not.

### Which is updated more often, HDOR or Smart Sync?

HDOR ships an update fortnightly, and Smart Sync every 2 months. Most recently, HDOR was updated on November 12, 2026 and Smart Sync on November 3, 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.*