# Boiler Efficiency vs Delta Drive Tool

The clearest difference is price: Delta Drive Tool at Free against Boiler Efficiency's $5.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Delta Drive Tool is free to download; Boiler Efficiency costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Boiler Efficiency ships an update every 10 months, Delta Drive Tool every 7 months. The most recent releases landed on September 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Boiler Efficiency | Delta Drive Tool |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 7 months** |
| Monetization | Paid | — |
| Size | 2 MB | 27 MB |
| Requires iOS | **14.3** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kaup Shenoy Associates](https://appshunter.io/developer/460148822) | [Delta Electronics, Inc.](https://appshunter.io/developer/386896582) |

## What reviewers say

### Boiler Efficiency

[App page](https://appshunter.io/ios/app/boiler-efficiency/id490506363)

Perform preliminary audits on boiler efficiency and identify various losses in steam generation. Customize boiler applications, compare fuel grades, and analyze heat balance and flue gas for potential savings and improvements.

**Highlights:** Boiler efficiency audits, Loss identification, Customizable boiler applications, Fuel grade comparison, Heat balance sheet, Flue gas analysis, CHP (Brayton) cycle analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### Delta Drive Tool

[App page](https://appshunter.io/ios/app/delta-drive-tool/id1624480114)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Boiler Efficiency free?

Boiler Efficiency costs $5.99, with no in-app purchases.

### Is Delta Drive Tool free?

Delta Drive Tool is free to download, with no in-app purchases.

### Do Boiler Efficiency or Delta Drive Tool have ads?

Neither Boiler Efficiency nor Delta Drive Tool shows ads.

### Which is updated more often, Boiler Efficiency or Delta Drive Tool?

Boiler Efficiency ships an update every 10 months, and Delta Drive Tool every 7 months. Most recently, Boiler Efficiency was updated on September 16, 2026 and Delta Drive Tool on September 10, 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.*