Kablo vs DuctChecker
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Kablo
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Kablo, calculates cable type and size, finds circuit breaker nominal break current and draws single line diagrams for main distribution or MCC panels power outputs for 3P or 1P 50Hz electrical circuits. Because you can change parameters easily and see the effect of that changes immediately, you might be able to make better decision selecting right cables or breakers. Using Kablo, you can make one quick calculation for one load or you can make calculation for several projects with up to 50 loads then you can send results as single line diagrams which can be opened by well known CAD softwares or you may prefer PDF output could be send by email or opened by iBook or any other PDF reader installed to your device. In case you use project option, the parameters you input is kept at your device. For calculations you have to input load parameters as usual but app supply comman parameters as default all you must do is changing defaults according to your needs. There is some difference about In ( nomΔ±nal breking current for breaker) calculation; Application finds the min nominal breaker current (In) but you may input higher current because breaker could be already installed or there could be a special load requires different In. Unless you input breaking current again at next calculation App finds In itself so inputing breaker current (In) as last parameter, may be a good idea. Application finds multicore cables up to 300mmΒ² . Calculated cables should be considered as minumum cable size could be used. Also, never forget that, min and max short circuit currents are not taken into account yet. Findings of Kablo should be taken account as reference source and checked by an engineer.
DuctChecker
Easily calculate duct dimensions using various engineering methods like constant pressure, static pressure regain, total pressure, and velocity. This tool simplifies complex duct design calculations, typically found in flow diagrams or slide rules.
- Constant pressure method calculation
- Static pressure regain method
- Total pressure method
- Velocity method
- Duct dimension determination
- Simplified duct design
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To determine the size of the duct constant pressure method, static pressure regain method, total pressure method, velocity method. Generally uses constant pressure method. This constant pressure method is how to determine the duct dimensions using the same value per 1 m on all duct friction loss. Usually determined by flow diagrams or duct design for slide rules. You can easily determine the duct by using this program.
Screenshots
Verdict
The clearest difference is price: DuctChecker at $6.99 against Kablo's $9.99. On update cadence, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Kablo costs $9.99 and DuctChecker $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Kablo ships an update every 3 months, DuctChecker every 4 months. The most recent releases landed on May 16, 2026 and September 7, 2026 respectively.
| Parameter | Kablo | DuctChecker |
|---|---|---|
| Price | $9.99 | $6.99 β better |
| Positive reviews | β | 0.0% of reviews |
| Update frequency | Every 3 months β better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | β | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details β not scored | ||
| Size | 2 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | UMIT CELEN | AIR DESIGN, INC. |
In-app purchases
Kablo
No in-app purchases
DuctChecker
No in-app purchases









