# Radar Sensor vs LockMemo

The clearest difference is in-app purchases: Radar Sensor at none against LockMemo's 1. Radar Sensor also leads on iOS requirement (13.0 vs 16.0). LockMemo's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. LockMemo sells 1 one-off in-app purchase. Radar Sensor asks for nothing beyond the download.

Radar Sensor ships an update every 2 months, LockMemo every 2 weeks. The most recent releases landed on October 1, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Radar Sensor | LockMemo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 67 MB | 56 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [正亮 黄](https://appshunter.io/developer/6780918447) | [NIXLIGHT TECHNOLOGY LIMITED](https://appshunter.io/developer/6780908470) |

## What reviewers say

### Radar Sensor

[App page](https://appshunter.io/ios/app/radar-sensor/id6780945082)

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

**In-app purchases:** none


### LockMemo

[App page](https://appshunter.io/ios/app/lockmemo-passwords-and-2fa/id6782010791)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LockMemo Premium (Lifetime) | $9.99 | one-time |


## Frequently asked questions

### Is Radar Sensor free?

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

### Is LockMemo free?

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

### Do Radar Sensor or LockMemo have ads?

Neither Radar Sensor nor LockMemo shows ads.

### Which is updated more often, Radar Sensor or LockMemo?

Radar Sensor ships an update every 2 months, and LockMemo every 2 weeks. Most recently, Radar Sensor was updated on October 1, 2026 and LockMemo on September 29, 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.*