# Theta vs Dircode lock

The clearest difference is update cadence: Dircode lock at every 6 weeks against Theta's every 19 months. Theta's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Theta ships an update every 19 months, Dircode lock every 6 weeks. The most recent releases landed on June 1, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Theta | Dircode lock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 38 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mikhail Fedorov](https://appshunter.io/developer/714735606) | [Anton Poletaev](https://appshunter.io/developer/1896055196) |

## What reviewers say

### Theta

[App page](https://appshunter.io/ios/app/theta-meter-watch/id1525336419)

This application measures the electrical resistance of objects when connected to compatible hardware via Bluetooth. It displays changes in resistance using a needle indicator, providing dynamic readings. The app is designed for informational purposes and is not for medical use.

**Highlights:** Bluetooth LE 4.0 connectivity, Measures electrical resistance, Needle indicator for dynamics, Compatible with e-meter hardware, Supports watch, iPhone, and iPod

**In-app purchases:** none


### Dircode lock

[App page](https://appshunter.io/ios/app/dircode-lock/id6765741629)

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

**In-app purchases:** none


## Frequently asked 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 19 months, and Dircode lock every 6 weeks. Most recently, Theta was updated on June 1, 2026 and Dircode lock on September 8, 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.*