Comparison

Theta vs Dircode lock

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

Head to head
About

Theta

Read full description

Theta-Meter X Theta-Meter X is a companion application designed to work with compatible Theta-Meter hardware devices.  The app connects via Bluetooth Low Energy (BLE 4.0 or higher) or Wi-Fi and displays real-time electrical resistance  measurements from objects connected to the device’s electrodes. Key Features: - Real-time visualization of electrical resistance changes - Clear analog-style needle indicator for dynamic monitoring - Bluetooth LE and Wi-Fi connectivity - Simple, user-friendly interface - Stable data transmission from supported hardware devices How It Works When connected to a compatible device, the app measures and displays variations in electrical resistance detected between  attached electrodes. The needle indicator provides a continuous visual representation of resistance fluctuations, allowing  users to observe dynamic changes over time. Intended Use Theta-Meter X is designed for general experimental, educational, and technical purposes involving electrical resistance measurement.  It is intended for use with compatible hardware devices only. Important Notice This application and the associated hardware are not medical devices. They are not intended for diagnosing, treating, curing,  preventing, or mitigating any disease or health condition. The app does not provide medical, therapeutic, or psychological advice.

About

Dircode lock

Features
Read full description

Dircode is an app for managing smart locks and access devices. The app lets you connect compatible locks, manage access rights, and view transaction history. Key features: - Connect and manage compatible locks via Bluetooth; - View a list of locks and Wi-Fi gateways; - Manage user access rights; - Work with codes, cards, and fingerprints, if supported by the device; - View event logs and transaction history; - Sync records and perform basic device setup. The availability of individual features depends on the lock model, gateway, and supported device capabilities.

Screenshots

Theta2 screens
Dircode lock4 screens

Verdict

The call

The clearest difference is update cadence: Dircode lock at every 6 weeks against Theta's every 3 months. On price, ads, in-app purchases and device support 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.

UpkeepUpdate frequency

Theta ships an update every 3 months, Dircode lock every 6 weeks. The most recent releases landed on May 13, 2026 and September 8, 2026 respectively.

Scorecard1 real difference · 5 level
Theta versus Dircode lock: the parameters behind the verdict, then further details
ParameterThetaDircode lock
PriceFreeFree
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS1716.0 — better
Further details — not scored
Size18 MB38 MB
Age rating12+4+
DeveloperMikhail FedorovAnton Poletaev

In-app purchases

None

Theta

No in-app purchases

None

Dircode lock

No in-app purchases

Questions

Is Theta free?
Theta is free to download, with no in-app purchases.
Is Dircode lock free?
Dircode lock is free to download, with no in-app purchases.
Do Theta or Dircode lock have ads?
Neither Theta nor Dircode lock shows ads.
Which is updated more often, Theta or Dircode lock?
Theta ships an update every 3 months, and Dircode lock every 6 weeks. Most recently, Theta was updated on May 13, 2026 and Dircode lock on September 8, 2026.

Other comparisons