Comparison

O vs Smart Lock

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

Head to head
About

O

This app provides a comprehensive offline tool for selecting standard rubber seal sizes, including O-Rings, X-Rings, and Back-Up Rings. It offers dimension searches, housing calculations for various sealing applications, and supports multiple international standards in both metric and imperial units.

Highlights
  • Offline standard rubber seal size selection
  • Search for O-Ring, X-Ring, and Back-Up Ring sizes
  • O-Ring housing calculations for sealing applications
  • Supports multiple international standards (AS568, METRIC, JIS, etc.)
  • Metric and Imperial unit support
  • Substitutable O-Ring size suggestions
Features
Read full description

GMORS O-Ring Master is the completed tool for standard rubber seal sizes. When you use this APP, you don't need to have internet and catalog. Except O-Ring sizes, it also includes the search functions of X-Ring and Back-Up Ring. Otherwise, you can also use O-Ring Housing to choose suitable O-Ring in your application. Main functions are as follows: Dimension Search:O-Ring, X-Ring and Back-Up Ring. - MM and Inch are both available. - Full standard O-Ring series: AS568, BS 4518, GB/T 3452.1, JIS B2401 P, JIS B2401 G, JIS B2401 S, JIS B2401 V, SMS 1586 and METRIC. - Collocated Back-Up for AS-568 O-Ring. - Substitutable O-Ring sizes within tolerance are available. O-Ring Housing: Piston Sealing、Rod Sealing and Face Sealing. - MM and Inch are both available. - Support calculation for both Static and Dynamic sealing applications (Face sealing is with static calculation only). - Up to 7 O-Ring standards ( AS568, METRIC, JIS B2401 P/G/S/V, JASO F404, GB/T 3452.1, BS 4518 and SMS 1586) for most of size requirement of different groove design.

About

Smart Lock

This utility app works with a specific mechatronic lock and key system to manage access and track operations. It allows users to find smart keys, open authorized locks, apply for access tickets, and view operation logs. The app also facilitates lock management and provides navigation to stations.

Highlights
  • Search and connect to Smart Keys
  • Open authorized Smart Locks
  • Apply for and manage lock access tickets
  • View daily, weekly, and monthly operation logs
  • Manage lock authorizations and One Time Passwords
  • Initialize, reset, and bind locks
  • Navigate to station locations
Features
Read full description

Smart Lock App is the App working with Smart Lock solution which help user to reduce OPEX and increase efficiency and security level during user’s daily operating work. This App is only working with corresponding mechatronic lock and key. Function: Search for Smart Key Click the icon of key on the homepage to find the Smart Key, and then click the Smart Key ID to connect. Open Smart Lock Click the icon of lock on the homepage to open a Smart Lock while the login account has proper authorization. My Ticket New: Apply new ticket to get authorization to open lock. Pending: Pending ticket that wait for approval. Rejected: Rejected ticket. Approved: Ticket that approved. My Operation Today: The event log for today. Week: The event log for one week. Month: The event log for one month. More: The event log for one month ago. Management Authorization: Assigned lock authorization and One Time Password. Lock: Initialize lock, Reset lock, Bind lock and get lock ID. Approve: To approve pending ticket for user who has privilege. Offline & Log: Download the assigned lock authorization to Smart Key and Check or Collect event logs from Smart Key. Navigation Check the location of stations and user also can get navigation information by click the station. Note: 1. iPhone 4s or above is required since this App is required to use Bluetooth 4.0. 2. GPS running in the background can be big battery usage.

Screenshots

O4 screens
Smart Lock3 screens

Verdict

The call

The clearest difference is rating: O at 5.0 against Smart Lock's 1.0. Smart Lock's advantage is update cadence (every 2 months vs every 11 months) and iOS requirement (13.0 vs 16.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

O holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

O ships an update every 11 months, Smart Lock every 2 months. The most recent releases landed on September 22, 2026 and June 11, 2026 respectively.

Scorecard3 real differences · 7 level
O versus Smart Lock: the parameters behind the verdict, then further details
ParameterOSmart Lock
PriceFreeFree
Rating5.0 (1 ratings) — better1.0 (1 ratings)
Positive reviews—0.0% of reviews
Number of ratings11
Update frequencyEvery 11 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size47 MB9 MB
Age rating4+4+
DeveloperGE MAO RUBBER INDUSTRIAL CO., LTD.Hizima Technologies Co., Ltd

Customer experience

O

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Smart Lock

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

O

No in-app purchases

None

Smart Lock

No in-app purchases

Questions

Is O free?
O is free to download, with no in-app purchases.
Is Smart Lock free?
Smart Lock is free to download, with no in-app purchases.
Which has better reviews, O or Smart Lock?
O is rated higher. O averages 5.0 out of 5 from 1 ratings, while Smart Lock averages 1.0 from 1 ratings.
Do O or Smart Lock have ads?
Neither O nor Smart Lock shows ads.
Which is updated more often, O or Smart Lock?
O ships an update every 11 months, and Smart Lock every 2 months. Most recently, O was updated on September 22, 2026 and Smart Lock on June 11, 2026.

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