# Crabtree On vs Optimech

The clearest difference is update cadence: Optimech at fortnightly against Crabtree On's every 8 months. Crabtree On's advantage is iOS requirement (9.1 vs 13.0). 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.

Crabtree On ships an update every 8 months, Optimech fortnightly. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Crabtree On | Optimech |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 68 MB | 18 MB |
| Requires iOS | **9.1** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Havells India Limited](https://appshunter.io/developer/903019399) | [Heffl Ventures LLC](https://appshunter.io/developer/1710784608) |

## What reviewers say

### Crabtree On

[App page](https://appshunter.io/ios/app/crabtree-on/id1458724992)

Control smart building functions like lighting, climate, and security directly from your smartphone. Monitor device status and manage various IoT devices remotely for enhanced convenience.

**Highlights:** Smart device connectivity, Lighting control, Curtain/blind adjustment, Climate management, Audio/video control, Security monitoring, IR device operation

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

**In-app purchases:** none


### Optimech

[App page](https://appshunter.io/ios/app/optimech/id6468889824)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Crabtree On free?

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

### Is Optimech free?

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

### Do Crabtree On or Optimech have ads?

Neither Crabtree On nor Optimech shows ads.

### Which is updated more often, Crabtree On or Optimech?

Crabtree On ships an update every 8 months, and Optimech fortnightly. Most recently, Crabtree On was updated on October 16, 2026 and Optimech on October 9, 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.*