# SAJ vs Energy Controller for Powston

The clearest difference is update cadence: Energy Controller for Powston at weekly against SAJ's every 12 months. SAJ's advantage is iOS requirement (10.0 vs 17.6). 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.

SAJ ships an update every 12 months, Energy Controller for Powston weekly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | SAJ | Energy Controller for Powston |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Weekly** |
| Size | 69 MB | 13 MB |
| Requires iOS | **10.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, Apple TV, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [SAJ Instrument Ab](https://appshunter.io/developer/962246290) | [Richard Bollar](https://appshunter.io/developer/1864304955) |

## What reviewers say

### SAJ

[App page](https://appshunter.io/ios/app/saj-dms-mobile/id962279584)

**Features:** macOS Compatibility

**In-app purchases:** none


### Energy Controller for Powston

[App page](https://appshunter.io/ios/app/energy-controller-for-powston/id6757072169)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SAJ free?

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

### Is Energy Controller for Powston free?

Energy Controller for Powston is free to download, with no in-app purchases.

### Do SAJ or Energy Controller for Powston have ads?

Neither SAJ nor Energy Controller for Powston shows ads.

### Which is updated more often, SAJ or Energy Controller for Powston?

SAJ ships an update every 12 months, and Energy Controller for Powston weekly. Most recently, SAJ was updated on October 29, 2026 and Energy Controller for Powston on October 30, 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.*