VOLT by ealloora vs Duct Construction
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VOLT by ealloora
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It constantly monitors the presence of electricity. It sends you a notification if it detects a power outage. It sends you a notification when power is restored.
Duct Construction
This app helps determine duct construction and reinforcement options based on duct size and system pressure class. It provides condensed lists of suitable options, saving time spent on manual calculations and table lookups. Results are based on industry standards for galvanized steel duct sheets.
- Duct size range from 2" to 120"
- Pressure classes up to 4 in.wg
- Calculates duct weights per linear foot
- Determines required duct gauge and reinforcement spacing
- Clear illustrations for reinforcement types
- Simple and effective UI design
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Get all duct construction and reinforcement options by entering the duct size and system pressure class. The aim of the app is to save time spent browsing through tables and texts to determine suitable options, by relying on the most widely used standards and providing a condensed list of available duct construction options. The results are based on galvanized steel duct sheets conforming to ASTM A653 & A924. The app does not cover all aspects of duct construction, as it is intended as a guide; Reliance on related standards, as well as good engineering sense is the basis for proper design. Features: 1. Duct sizes from 2" to 120" 2. Pressure classes 0.5 in.wg, 1 in.wg, 2 in.wg, 3 in.wg and 4 in.wg. 3. Provides the duct weights for each option per linear foot. 4. Provides required duct gauge and reinforcement spacing. 5. Clear illustration for each reinforcement type, as well as dimensions. 6. Simple and effective UI design. Roadmap / Upcoming updates: 1. SI units. 2. More pressure class options. 3. User will be able to save and retreive duct data for future reference. 3. More Reinforcement options, including tie-rodding. Request a feature: welmurr@icloud.com
Screenshots
Verdict
The clearest difference is price: VOLT by ealloora at Free against Duct Construction's $0.99. VOLT by ealloora also leads on update cadence (every 3 weeks vs every 10 months) and iOS requirement (10.0 vs 17.6). Duct Construction's advantage is chart position (#121 vs unranked). On 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
VOLT by ealloora is free to download; Duct Construction costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
VOLT by ealloora ships an update every 3 weeks, Duct Construction every 10 months. The most recent releases landed on September 8, 2026 and September 25, 2026 respectively.
| Parameter | VOLT by ealloora | Duct Construction |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Best chart rank | — | #121 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 19 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Sayme Wireless Sensor Network | Wassim Murr |
In-app purchases
VOLT by ealloora
No in-app purchases
Duct Construction
No in-app purchases
Questions
Is VOLT by ealloora free?
Is Duct Construction free?
Do VOLT by ealloora or Duct Construction have ads?
Which is updated more often, VOLT by ealloora or Duct Construction?
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