# U vs EchoLock

The clearest difference is review sentiment: EchoLock at 100% against U's 29%. EchoLock also leads on rating (5.0 vs 2.3) and update cadence (every 5 days vs every 3 months). U's advantage is in-app purchases (none vs 1) and ratings volume (17 vs 1). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. EchoLock sells 1 one-off in-app purchase. U asks for nothing beyond the download.

EchoLock holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: U has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 29% of U's written reviews are positive against 100% of EchoLock's.

U ships an update every 3 months, EchoLock every 5 days. The most recent releases landed on October 8, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | U | EchoLock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (17 ratings)](https://appshunter.io/ios/app/u-disk/id1119397038/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/echolock-lock-reminder/id6758783997/reviews)** |
| Number of ratings | **17** | 1 |
| Positive reviews | 29.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 52 MB | 39 MB |
| Requires iOS | **12.1** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [岚 丁](https://appshunter.io/developer/1465584117) | [Andrew Rizzo](https://appshunter.io/developer/1874980406) |

## What reviewers say

### U

[App page](https://appshunter.io/ios/app/u-disk/id1119397038)

Expand your iOS device's storage with this portable flash drive. Seamlessly transfer, view, and manage files between your iPhone/iPad and Mac/PC without needing Wi-Fi or a network signal. Features include file encryption and contact backup.

**Highlights:** Memory expansion for iOS devices, Two-way storage transfer (iOS to Mac/PC), No Wi-Fi or network signal required, Transfer, view, and share files, File encryption, Contacts backup and restore, Video streaming via Airplay

**In-app purchases:** none


### EchoLock

[App page](https://appshunter.io/ios/app/echolock-lock-reminder/id6758783997)

This app provides timely reminders for essential lock and safety checks, helping you leave home with confidence. Its simple, distraction-free design focuses on building better habits around everyday safety without unnecessary complexity.

**Highlights:** Timely lock and safety reminders, Simple and distraction-free design, Builds better safety habits, Lightweight and focused, Easy to use

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support EchoLock | $1.99 | one-time |


## Frequently asked questions

### Is U free?

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

### Is EchoLock free?

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

### Which has better reviews, U or EchoLock?

EchoLock is rated higher. U averages 2.3 out of 5 from 17 ratings, while EchoLock averages 5.0 from 1 ratings.

### Do U or EchoLock have ads?

Neither U nor EchoLock shows ads.

### Which is updated more often, U or EchoLock?

U ships an update every 3 months, and EchoLock every 5 days. Most recently, U was updated on October 8, 2026 and EchoLock on September 13, 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.*