# AlterLock vs ParkLimit

The clearest difference is ads: AlterLock at none against ParkLimit's shown. AlterLock also leads on iOS requirement (15.0 vs 26.5). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. AlterLock sells 2 in-app purchases, starting at $3.99 per month and ParkLimit sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

AlterLock ships an update every 2 months, ParkLimit monthly. The most recent releases landed on October 19, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | AlterLock | ParkLimit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/alterlock/id1418389534/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 87 MB | 6 MB |
| Requires iOS | **15.0** | 26.5 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NEXTSCAPE INC.](https://appshunter.io/developer/434362565) | [Kazuki Sugitani](https://appshunter.io/developer/6773256616) |

## What reviewers say

### AlterLock

[App page](https://appshunter.io/ios/app/alterlock/id1418389534)

This app pairs with a theft prevention device to monitor your vehicle. It offers loud alarms, smartphone notifications, and GPS tracking to deter theft and provide location updates. Manage vehicle details, device settings, and track your assets with peace of mind.

**Highlights:** Movement-detection alarm, Smartphone notifications, Independent communication, Advanced GPS tracking, Vehicle registration, Device settings adjustment, Map-based location history

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $3.99 | per month |
| Annual Plan | $39.95 | per year |


### ParkLimit

[App page](https://appshunter.io/ios/app/parklimit/id6777877112)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ParkLimit Pro | $3.99 | one-time |


## Frequently asked questions

### Is AlterLock free?

AlterLock is free to download, with in-app purchases available.

### Is ParkLimit free?

ParkLimit is free to download, with in-app purchases available.

### Do AlterLock or ParkLimit have ads?

ParkLimit shows ads; AlterLock does not.

### Which is updated more often, AlterLock or ParkLimit?

AlterLock ships an update every 2 months, and ParkLimit monthly. Most recently, AlterLock was updated on October 19, 2026 and ParkLimit on September 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.*