Kwanjai Next vs DuctSizer
Price, ratings, monetisation and update history for both apps, side by side â with what reviewers say about each.
Kwanjai Next
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Kwanjai Next application is a collaboration platform for After-sales warranty and facility management.
DuctSizer
This utility app provides a quick and accurate ductulator for calculating equivalent round and rectangular duct sizes. It supports both Imperial and SI units, offering a simple finger-slide interface for fast computations.
- Quick duct size calculations
- Accurate results
- Equivalent round and rectangular sizes
- IP and SI unit support
- Finger slide interface
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The Duct Sizer is a productivity app developed by Nopparat Katkhaw. The app is a simplest and quickest ductulator. Perform quick calculation and accurate results. Use the finger slide for quick calculations. Shows equivalent round and rectangular duct sizes. Compatible with IP and SI units. We would very much like your feedback! Pleas contacts Facebook page: https://www.facebook.com/UP.Energy4You
Screenshots
Verdict
The clearest difference is price: Kwanjai Next at Free against DuctSizer's $4.99. DuctSizer's advantage is update cadence (every 4 days vs fortnightly). On ads, in-app purchases, device support and iOS requirement 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
Kwanjai Next is free to download; DuctSizer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Kwanjai Next ships an update fortnightly, DuctSizer every 4 days. The most recent releases landed on September 19, 2026 and June 1, 2026 respectively.
| Parameter | Kwanjai Next | DuctSizer |
|---|---|---|
| Price | Free â better | $4.99 |
| Positive reviews | â | 100.0% of reviews |
| Update frequency | Fortnightly | Every 4 days â better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | â | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 â better |
| Further details â not scored | ||
| Size | 39 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | builk one group | MULBERRYSOFT COMPANY LIMITED |
In-app purchases
Kwanjai Next
No in-app purchases
DuctSizer
No in-app purchases
Questions
Is Kwanjai Next free?
Is DuctSizer free?
Do Kwanjai Next or DuctSizer have ads?
Which is updated more often, Kwanjai Next or DuctSizer?
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