# Viper SmartStart vs CarLock

The clearest difference is monetization model: Viper SmartStart at free with in-app purchases against CarLock's subscription. Viper SmartStart also leads on ratings volume (8.1K vs 357) and device support (3 vs 1). CarLock's advantage is review sentiment (86% vs 62%) and update cadence (monthly vs every 3 months). On price, rating, 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.

Viper SmartStart holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: Viper SmartStart has 8.1K ratings behind it against 357, so its average is the more settled of the two. Written reviews complicate that: 62% of Viper SmartStart's written reviews are positive against 86% of CarLock's, so the app with the better star average is not the one people write more warmly about.

Viper SmartStart ships an update every 3 months, CarLock monthly. The most recent releases landed on September 21, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Viper SmartStart | CarLock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (8.1K ratings)](https://appshunter.io/ios/app/viper-smartstart/id333400981/reviews)** | [4.4 (357 ratings)](https://appshunter.io/ios/app/carlock-advanced-car-tracker/id721180397/reviews) |
| Number of ratings | **8.1K** | 357 |
| Positive reviews | 62.3% of reviews | **86.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 179 MB | 145 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Directed](https://appshunter.io/developer/329155615) | [Protectus Technologies, Inc](https://appshunter.io/developer/1355602712) |

## What reviewers say

### Viper SmartStart

[App page](https://appshunter.io/ios/app/viper-smartstart/id333400981)

Control your car remotely from your smartphone or smartwatch. Start, lock, unlock, and locate your vehicle from anywhere. Receive real-time status updates and safety notifications.

**Highlights:** Remote start, lock, and unlock, Vehicle location tracking, Real-time status updates, Safety notifications (speeding, geofencing), Trunk release, Apple Watch control, Roadside assistance

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Years of reliable use
- 🔒 Secure and dependable
- 👍 Convenient remote start and control
- 👍 Helpful in cold/hot weather
- 👍 Easy to use app

**What reviewers complain about**

- 🐛 Connectivity issues and unreliable performance
- 🐛 Frequent disconnects and errors
- 🐛 Buggy app with crashes and glitches
- 🔋 Battery drain on phone
- 🤔 Lacking key features like temperature monitoring

**Reported bugs**

- App crashing on map view
- Persistent login issues
- Vehicle status not updating correctly
- Geofencing not working as expected

**Requested features**

- Siri/Shortcuts integration
- Customizable dashboard and widgets
- Automatic start/stop based on temperature
- Improved notification system


### CarLock

[App page](https://appshunter.io/ios/app/carlock-advanced-car-tracker/id721180397)

This app provides real-time tracking and alerts for your vehicle, monitoring for movement, engine starts, vibrations, and device tampering. It also tracks driving behavior, monitors car battery health, and logs trip history for enhanced security and peace of mind.

**Highlights:** Real-time vehicle tracking, Movement and engine start alerts, Driving behavior monitoring (acceleration, braking), Car battery health alerts, Detailed trip tracking, Device tampering alerts

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate GPS tracking
- 🔒 Reliable security features
- 👍 Easy to use app
- 💡 Comprehensive vehicle monitoring
- 🚗 Helpful for fleet management

**What reviewers complain about**

- 🐛 Occasional false alarms
- 🕰️ Delayed notifications
- 🔧 Inconsistent performance after updates
- 🤖 Unreliable proximity sensor
- 💰 Subscription cost concerns

**Reported bugs**

- GPS location inaccuracies
- App crashes and freezes
- Sync issues between device and app

**Requested features**

- Faster alert notifications
- More customizable sensor sensitivity
- Integration with smart home/voice assistants
- Improved multi-vehicle management


## Frequently asked questions

### Is Viper SmartStart free?

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

### Is CarLock free?

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

### Which has better reviews, Viper SmartStart or CarLock?

Viper SmartStart is rated higher. Viper SmartStart averages 4.6 out of 5 from 8.1K ratings, while CarLock averages 4.4 from 357 ratings.

### Do Viper SmartStart or CarLock have ads?

Neither Viper SmartStart nor CarLock shows ads.

### Which is updated more often, Viper SmartStart or CarLock?

Viper SmartStart ships an update every 3 months, and CarLock monthly. Most recently, Viper SmartStart was updated on September 21, 2026 and CarLock on September 9, 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.*