# TLV ToolBox vs Mec Eng Tools

The clearest difference is review sentiment: TLV ToolBox at 75% against Mec Eng Tools's 21%. TLV ToolBox also leads on in-app purchases (none vs 10) and iOS requirement (9.3 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Mec Eng Tools sells 10 one-off in-app purchases. TLV ToolBox asks for nothing beyond the download.

TLV ToolBox ships an update every 4 months, Mec Eng Tools every 2 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | TLV ToolBox | Mec Eng Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (8 ratings)](https://appshunter.io/ios/app/tlv-toolbox/id653406777/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | **75.0% of reviews** | 21.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 41 MB |
| Requires iOS | **9.3** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TLV CO.,LTD.](https://appshunter.io/developer/653406780) | [Eduardo Almeida](https://appshunter.io/developer/906209752) |

## What reviewers say

### TLV ToolBox

[App page](https://appshunter.io/ios/app/tlv-toolbox/id653406777)

This utility app transforms your mobile device into a portable steam calculation tool. It assists with onsite calculations for control valve stations, condensate recovery systems, and various maintenance tasks, reducing the need for multiple trips.

**Highlights:** Steam Tables (saturated and superheated), Steam Pipe Sizing, Condensate Pipe Sizing, Heating Calculations, Cv and Kv Values, Stall Point

**Features:** macOS Compatibility

**In-app purchases:** none


### Mec Eng Tools

[App page](https://appshunter.io/ios/app/mec-eng-tools/id1046405234)

This utility app calculates thermodynamic properties using IAPWS-97 equations. It allows users to determine various properties like pressure, temperature, enthalpy, and specific volume based on different input parameters. The app supports multiple units for calculations.

**Highlights:** IAPWS-97 equation calculations, Calculate properties from pressure and temperature, Calculate properties from pressure and enthalpy, Calculate properties from pressure and entropy, Calculate properties from pressure and quality, Support for multiple units

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade Steam Tables | $3.99 | one-time |
| Stress & Strain | $4.99 | one-time |
| Machine Design | $4.99 | one-time |
| Pressure Vessels | $4.99 | one-time |
| Fluids & Piping Pack | $6.99 | one-time |
| Thermal Pack: Steam Complement | $6.99 | one-time |
| Thermal Sciences Pack | $10.49 | one-time |
| Solids & Design Pack | $10.49 | one-time |
| Collection: Steam Complement | $24.49 | one-time |
| Complete Engineering Collection | $27.99 | one-time |


## Frequently asked questions

### Is TLV ToolBox free?

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

### Is Mec Eng Tools free?

Mec Eng Tools is free to download, with in-app purchases available.

### Do TLV ToolBox or Mec Eng Tools have ads?

Neither TLV ToolBox nor Mec Eng Tools shows ads.

### Which is updated more often, TLV ToolBox or Mec Eng Tools?

TLV ToolBox ships an update every 4 months, and Mec Eng Tools every 2 months. Most recently, TLV ToolBox was updated on November 6, 2026 and Mec Eng Tools on November 6, 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.*