# Dimo's / Labtronics Model 919 vs P&H Central

The clearest difference is price: P&H Central at Free against Dimo's / Labtronics Model 919's $2.99. P&H Central also leads on update cadence (every 2 months vs every 14 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

P&H Central is free to download; Dimo's / Labtronics Model 919 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Dimo's / Labtronics Model 919 ships an update every 14 months, P&H Central every 2 months. The most recent releases landed on October 26, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Dimo's / Labtronics Model 919 | P&H Central |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 9 MB | 65 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Dimo's Tool & Die Ltd.](https://appshunter.io/developer/534271329) | [Parrish & Heimbecker, Limited](https://appshunter.io/developer/1470269564) |

## What reviewers say

### Dimo's / Labtronics Model 919

[App page](https://appshunter.io/ios/app/dimos-labtronics-model-919/id534271306)

This application replaces paper charts for moisture testing. Input sample temperature and readings from a Model 919 moisture tester to quickly calculate moisture content. It supports storing favorite commodities and includes both U.S. and Canadian charts, along with test weight conversions.

**Highlights:** Replaces paper charts, Input temperature and readings, Calculate moisture content, Store favorite commodities, U.S. and Canadian charts, Test weight conversion

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

**In-app purchases:** none


### P&H Central

[App page](https://appshunter.io/ios/app/p-and-h-central/id6504573253)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dimo's / Labtronics Model 919 free?

Dimo's / Labtronics Model 919 costs $2.99, with no in-app purchases.

### Is P&H Central free?

P&H Central is free to download, with no in-app purchases.

### Do Dimo's / Labtronics Model 919 or P&H Central have ads?

Neither Dimo's / Labtronics Model 919 nor P&H Central shows ads.

### Which is updated more often, Dimo's / Labtronics Model 919 or P&H Central?

Dimo's / Labtronics Model 919 ships an update every 14 months, and P&H Central every 2 months. Most recently, Dimo's / Labtronics Model 919 was updated on October 26, 2026 and P&H Central on October 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.*