Trek Diaper vs Diaper Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Trek Diaper
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Trek Diaper is a smart device attached on baby/adult diaper to instantly detect the urinates. It allows caretaker to monitor Trek Diaper directly using Bluetooth Low Energy (up to 70m). Its main functions: 1. Get real-time humidity and temperature of diapers; 2. Detect urinates and give alarm in time to change new diaper; 3. Count the usage amount of baby diapers. A demo video can be found at https://www.youtube.com/watch?v=qcqsNhSIyyE
Diaper Calc
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.
- 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
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As a father, I have struggled every time we needed a new pack of diapers: "Which package should I buy?", "Can I buy directly a bigger pack or is my baby already outgrowing the current diaper size?" These were the questions I asked myself constantly and that is why I have created this app. DiaperCalc is a simple but useful utility for parents that counts how many disposable diapers do you need to have in a specified period of time. The computation is based on the baby current weight and expected baby growth based on percentile curves of pediatric growth charts. Main features: • Computes diaper count and sizes for the selected period of time (up to 3 years of age) • Recommends which packaging is ideal to purchase • Displays chart with expected baby growth • Available to distinguish US and EU diaper sizes • Usable for more than one child • Contains useful tips related to diapers purchases and pre-stocking • Works offline • Light/Dark mode support Enjoy the app and do not hesitate to share your feedback with me!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Trek Diaper | Diaper Calc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 9.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 24 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Trek2000 | Pavel Zak |
In-app purchases
Trek Diaper
No in-app purchases
Diaper Calc
No in-app purchases
Questions
Is Trek Diaper free?
Is Diaper Calc free?
Do Trek Diaper or Diaper Calc have ads?
Which is updated more often, Trek Diaper or Diaper Calc?
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