CORIOmaster vs Diaper Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CORIOmaster
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CORIOmaster enables you to control all your local devices of tvone's CORIOmaster series over the network. You will have to be in the same network as your devices.
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 offers helpful purchasing tips. The app supports multiple children and works offline.
- Computes diaper count and sizes for up to 3 years
- Recommends ideal diaper packaging
- Displays baby growth charts
- Supports US and EU diaper size distinctions
- Usable for multiple children
- Offers 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: CORIOmaster at every 11 months against Diaper Calc's every 39 months. CORIOmaster also leads on iOS requirement (11.0 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.
CORIOmaster ships an update every 11 months, Diaper Calc every 39 months. The most recent releases landed on October 29, 2026 and October 13, 2026 respectively.
| Parameter | CORIOmaster | Diaper Calc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 11 months — better | Every 39 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 18 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | tvone limited | Pavel Zak |
In-app purchases
CORIOmaster
No in-app purchases
Diaper Calc
No in-app purchases
Questions
Is CORIOmaster free?
Is Diaper Calc free?
Do CORIOmaster or Diaper Calc have ads?
Which is updated more often, CORIOmaster or Diaper Calc?
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