FILL ◦ Conduit Fill Calculator is a utility app for electricians and apprentices that automates NEC-compliant conduit fill calculations on iOS.
The App DNA
What makes this app unique?
The app removes the time-cost of manual NEC table lookups and the reliability-risk of cloud-dependent tools, serving users who require immediate, offline access to code-compliant data on jobsites.
For Electricians and apprentices requiring fast, reliable, and offline-capable conduit fill reference tools for jobsite use.
What does it look like?
Key features
Calculates fill percentage for multiple conduit types using NEC 2023 and 2026 data.
Determines suitable conduit sizes based on conductor inputs, supporting complex field workflows.
Performs all calculations without network dependency, essential for jobsite reliability.
How much does it cost?
The freemium model uses a single-result trial to demonstrate utility before gating history and unlimited calculations behind a $7.99 one-time purchase.
Velocity
Maintenance developmentUX improvementsmonetizationShow more...
The app exhibits a maintenance-level release cadence, with only one version shipped in the observed window. Development is currently focused on functional refinements, including calculation accuracy, unit handling, and data management features. The release history indicates a stable, low-frequency update pattern rather than an active or intense development cycle. No live-ops or recurring event structures are present.
Who built it?
User Sentiment
What do users think recently?
Fresh user feedback skews thrilled. Users appreciate the quick and simple calculation tool provides immediate utility for users needing fast results.
How are ratings & reviews evolving?
What users say, by theme
- The quick and simple calculation tool provides immediate utility for users needing fast results
1 of 1 recent reviews analyzed · limited sample
Read the full review analysisCompetition
Competitive landscape for FILL ◦ Conduit Fill Calculator
How's the Utilities market?
FILL ◦ Conduit Fill Calculator operates in the Utilities category, differentiating itself through a one-time purchase model rather than the subscription-heavy norm. Its focus on offline NEC 2023/2026 compliance targets the specific reliability needs of field professionals.
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Access the full report for freeThe Analyst's Read
Key takeaways for FILL ◦ Conduit Fill Calculator
Where is it heading?
The market for electrical reference tools is consolidating around apps that provide high-accuracy, offline-first data. FILL ◦ Conduit Fill Calculator is well-positioned to maintain its user base by focusing on NEC compliance and tool reliability, provided it continues its current update cadence.
- The latest release added history backup and restore, signaling active maintenance that builds trust for professional users.
- The current one-time purchase model avoids subscription fatigue, which remains a primary frustration point in the broader utility app market.
The SWOT
- Offline-first calculation engine ensures jobsite reliability
- One-time purchase model removes subscription friction
- Expansion into specialized industrial wire types
Next best moves
Ship in-app tutorial for reverse sizing because it is a key differentiator → increase Pro conversion rate
The counter-intuitive read
The lack of cloud sync is a feature, not a bug…
Read the full takeBottom line
The offline-first utility and one-time pricing model effectively serve the field-professional segment, but increasing the visibility of advanced features like reverse sizing would unlock higher conversion rates for FILL ◦ Conduit Fill Calculator.
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Access the full report for freeFAQ
Is FILL ◦ Conduit Fill Calculator free to use?
Does FILL ◦ Conduit Fill Calculator work without internet?
Which NEC code editions are supported?
Sources
- [1] App Store, source
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