# AuCom Start Here vs Instrument Toolbox

The clearest difference is price: AuCom Start Here at Free against Instrument Toolbox's $1.99. Instrument Toolbox's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

AuCom Start Here is free to download; Instrument Toolbox costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AuCom Start Here ships an update every 3 weeks, Instrument Toolbox weekly. The most recent releases landed on September 27, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | AuCom Start Here | Instrument Toolbox |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Paid |
| Size | 69 MB | 8 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AUCOM ELECTRONICS LIMITED](https://appshunter.io/developer/1503942131) | [立娜 王](https://appshunter.io/developer/1761096632) |

## What reviewers say

### AuCom Start Here

[App page](https://appshunter.io/ios/app/aucom-start-here/id1534509869)

**In-app purchases:** none


### Instrument Toolbox

[App page](https://appshunter.io/ios/app/instrument-toolbox/id6698856248)

A professional calculator designed for industrial control, automation, and instrumentation engineers. It offers quick conversions and calculations for gas concentration, units, steam properties, flange levels, and pipeline flow. Ideal for both field debugging and engineering design.

**Highlights:** PPM to mg/m³ conversion with compensation, Industrial unit conversion (pressure, volume, temp, etc.), Saturated steam pressure and density calculator, Flange level migration calculations, Pipeline flow and velocity calculator, Real-time calculation results

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

**In-app purchases:** none


## Frequently asked questions

### Is AuCom Start Here free?

AuCom Start Here is free to download, with no in-app purchases.

### Is Instrument Toolbox free?

Instrument Toolbox costs $1.99, with no in-app purchases.

### Do AuCom Start Here or Instrument Toolbox have ads?

Neither AuCom Start Here nor Instrument Toolbox shows ads.

### Which is updated more often, AuCom Start Here or Instrument Toolbox?

AuCom Start Here ships an update every 3 weeks, and Instrument Toolbox weekly. Most recently, AuCom Start Here was updated on September 27, 2026 and Instrument Toolbox on September 23, 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.*