# Trek Diaper vs Diaper Calc

The clearest difference is update cadence: Trek Diaper at every 3 months against Diaper Calc's every 7 months. Trek Diaper also leads on iOS requirement (9.0 vs 16.6). 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.

Trek Diaper ships an update every 3 months, Diaper Calc every 7 months. The most recent releases landed on October 29, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Trek Diaper | Diaper Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/diaper-calc/id1489084828/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | — | Free |
| Size | 24 MB | 2 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Trek2000](https://appshunter.io/developer/409284633) | [Pavel Zak](https://appshunter.io/developer/536894801) |

## What reviewers say

### Trek Diaper

[App page](https://appshunter.io/ios/app/trek-diaper/id1189867037)

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

**In-app purchases:** none


### Diaper Calc

[App page](https://appshunter.io/ios/app/diaper-calc/id1489084828)

This utility helps parents estimate the number of diapers needed for their baby over a specific period. It considers the baby's current weight and projected growth to recommend optimal diaper pack sizes and purchases.

**Highlights:** Computes diaper count and sizes, Recommends ideal packaging, Displays baby growth chart, Supports US and EU diaper sizes, Usable for multiple children, Provides diaper purchase tips, Works offline, Light/Dark mode support

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

**In-app purchases:** none


## Frequently asked questions

### Is Trek Diaper free?

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

### Is Diaper Calc free?

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

### Do Trek Diaper or Diaper Calc have ads?

Neither Trek Diaper nor Diaper Calc shows ads.

### Which is updated more often, Trek Diaper or Diaper Calc?

Trek Diaper ships an update every 3 months, and Diaper Calc every 7 months. Most recently, Trek Diaper was updated on October 29, 2026 and Diaper Calc on November 7, 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.*