Electrician's Helper vs TVS Diode Array Product Selector
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electrician's Helper
This app simplifies electrical work by providing quick access to electrical codes and performing complex calculations for installations. It helps electricians find conductor ampacity, calculate voltage drop, determine box fill, and size raceways, among many other essential functions.
- 3 phase delta and wye circuit calculations
- Conductor ampacity lookup (NEC/CEC)
- Voltage drop calculation
- Box fill calculation
- Raceway fill and sizing
- Motor calculations
- Transformer calculations
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Electrician’s Helper will take the hassle out of looking up electrical codes and doing complex calculations for installations. With Electrician’s Helper you can... ● Calculate voltage, current and power in 3 phase delta and wye circuits. ● Find the ampacity of a conductor as per the NEC and CEC tables. ● Calculate the voltage drop in a line based on length, size, current and temperature. ● Find the total box fill by entering the size and number of conductors, straps and clamps. ● Find the maximum number of conductors allowed in a particular size raceway based on NEC and CEC rules. ● Determine what size raceway is needed for a bundle of conductors. ● Find the maximum bend radius of a conduit. ● Find the maximum capacitor kvar for a motor and the current reduction obtained. ● Find the motor current, heater current, breaker required, wire size, starter and conduit size for a particular 3 phase motor. ● Find the full load current of an induction, squirrel cage, and synchronous motor. ● Find the locked rotor current of a single or 3 phase motor. ● Estimate the Maximum Pull Tension. ● Calculate voltage, current and kVA of single and three phase transformers. ● Do basic ohm’s law calculations. ● Find decimal equivalents of fractions. ● Convert temperature scales. ● Look up connector configurations. ● Look up NEC tables 315.60(C)(1-20) Tested with iOS 16.6 thru iOS 26.3 Please note that this is a calculator for codes used in the NEC and CEC. It is not a replacement for the code books.
TVS Diode Array Product Selector
This app helps you find the right TVS Diode Array for your electronic circuits. It asks a few questions about your application to recommend the best product for ESD and lightning surge protection. You can also request samples and access datasheets.
- Product recommendation based on application needs
- Sample requests
- View product information and characteristics
- Download datasheets
- Access design resources
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The Littelfuse TVS Diode Array Product Selector App provides product recommendation based on the response to a few simple questions about your application. TVS Diode Arrays are used to protect sensitive electronic circuits from ESD & Lightning Surge transients. Request samples from Littelfuse, view product information, characteristics, and download datasheet. Additional design resources are available at www.littelfuse.com/spa (http://www.littelfuse.com/spa) or send an e-mail to spa@littelfuse.com
Screenshots
Verdict
The clearest difference is review sentiment: TVS Diode Array Product Selector at 100% against Electrician's Helper's 48%. TVS Diode Array Product Selector also leads on price (Free vs $12.99) and rating (5.0 vs 4.4). Electrician's Helper's advantage is ratings volume (13 vs 1) and chart position (#83 vs unranked). On update cadence, ads and in-app purchases 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
TVS Diode Array Product Selector is free to download; Electrician's Helper costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TVS Diode Array Product Selector holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Electrician's Helper has 13 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 48% of Electrician's Helper's written reviews are positive against 100% of TVS Diode Array Product Selector's.
Electrician's Helper ships an update every 3 months, TVS Diode Array Product Selector every 6 months. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.
| Parameter | Electrician's Helper | TVS Diode Array Product Selector |
|---|---|---|
| Price | $12.99 | Free — better |
| Rating | 4.4 (13 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 47.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 13 — better | 1 |
| Update frequency | Every 3 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #83 — better | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 8.4 — better |
| Further details — not scored | ||
| Size | 29 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Sam Virgillo | Littelfuse, Inc. |
Customer experience
Electrician's Helper
TVS Diode Array Product Selector
In-app purchases
Electrician's Helper
No in-app purchases
TVS Diode Array Product Selector
No in-app purchases
Questions
Is Electrician's Helper free?
Is TVS Diode Array Product Selector free?
Which has better reviews, Electrician's Helper or TVS Diode Array Product Selector?
Do Electrician's Helper or TVS Diode Array Product Selector have ads?
Which is updated more often, Electrician's Helper or TVS Diode Array Product Selector?
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