Comparison

SGUDA vs RETHLock

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

SGUDA

Features
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U-Lock is from the ground up to be right for every front door. It's powerful enough to remotely lock or unlock without the need of Wi-Fi hub and is simple enough to grant access or deny access to residents. Most importantly, all these wonderful features housed in a design by German sports car designer to ensure that it looks and feels like it’s part of your house. In addition, U-Lock is one of the few devices on the market with WiFi and Bluetooth built-in and offers up to one year of lock battery life (with just 4 AA batteries), thanks to SGUDA's professional R&D team in Taiwan. The advantage of built-in WiFi is that users don't have to pay extra for a WiFi hub, while greatly enhance the overall security. The SGUDA lock comes with its own bespoke app. The app is not only for opening or locking, it also allows you to change user settings, see the status of the lock, receive real-time updates on what is happening, manage access and even customize sound and music. Packaged in a straightforward, no-nonsense, and elegant user-interface designed by an award-winning design team.

About

RETHLock

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β€’ Supports access to RETH locks. β€’ Check operated records from locks. β€’ Authorized users to open the door at any time and everywhere. β€’ Locks suitable for apts, house, office..ect. β€’ Requirements: IPHONE with IOS 13 or higher. BLUETOOTH Please let us know if you meet any problem while using this APP. Email: reth.twni@msa.hinet.net For additional information, please visit: https://www.rethlock.com.tw

Screenshots

SGUDA4 screens
RETHLock4 screens

Verdict

The call

The clearest difference is iOS requirement: RETHLock at 13.0 against SGUDA's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 20, 2026 and September 22, 2026 respectively.

Scorecard1 real difference Β· 5 level
SGUDA versus RETHLock: the parameters behind the verdict, then further details
ParameterSGUDARETHLock
PriceFreeFree
Update frequencyFortnightlyFortnightly
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPod, Apple Watch β€” betteriPhone, iPod
Requires iOS15.613.0 β€” better
Further details β€” not scored
Size158 MB59 MB
Age rating4+4+
DeveloperSguda incUEIHAUR ENTERPRISE CO.,LTD

In-app purchases

None

SGUDA

No in-app purchases

None

RETHLock

No in-app purchases

Questions

Is SGUDA free?
SGUDA is free to download, with no in-app purchases.
Is RETHLock free?
RETHLock is free to download, with no in-app purchases.
Do SGUDA or RETHLock have ads?
Neither SGUDA nor RETHLock shows ads.
Which is updated more often, SGUDA or RETHLock?
SGUDA ships an update fortnightly, and RETHLock fortnightly. Most recently, SGUDA was updated on September 20, 2026 and RETHLock on September 22, 2026.

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