Comparison

Transformer Calculator Plus vs Panel Manager

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Transformer Calculator Plus

This utility app calculates key parameters for transformers, including voltage, current, and turns ratio. It helps determine if a transformer is step-up or step-down, essential for power conversion applications.

Highlights
  • Calculate primary and secondary voltage
  • Calculate primary and secondary current
  • Calculate transformer turns ratio
  • Determine step-up or step-down transformer
  • Supports AC voltage calculations
Features
Read full description

Transformer Calculator calculate any parameter within the transformer equation, including primary and secondary voltage, current, and turns. Transformer Calculations Include: Transformer Turns Ratio – Current and Turns Transformer Turns Ratio – Voltage and Turns Transformer Turns Ratio – Voltage and Current The result will indicate whether the transformer is step-up or step-down. Transformers are primarily used as power converters. The two types—step-up and step-down—operate on the same principle but in opposite directions. A step-up transformer converts a lower AC voltage to a higher voltage, while a step-down transformer reduces a higher AC voltage to a lower level. For example, if a country uses 110 V power, a step-up transformer converts it to 220 V, and a step-down transformer does the reverse. Both work with alternating current (AC). A transformer consists of a soft iron core with two coils wound around it, which are not electrically connected. These coils may be wound on separate limbs of the iron core or placed one over the other. The coil to which the alternating voltage is applied is called the primary coil or primary winding. When an alternating voltage is applied, the resulting alternating current in the primary winding generates a changing magnetic field. This changing field induces an alternating current in the secondary coil. The magnitude of the induced voltage depends on the number of turns in the secondary winding. All transformers have a nameplate rating. It is best to operate them within the voltage limits specified. Using a step-down transformer below its rated limit can support a wide range of applications, but exceeding the specified limit is dangerous and may cause electrical failure. The relationship between voltage, current, and the number of turns in each coil is given by: Vp/Vs = Np/Ns = Is/Ip Where: Vp – Primary voltage Vs – Secondary voltage Np – Primary turns Ns – Secondary turns Ip – Primary current Is – Secondary current Thank you for your support, and please visit nitrio.com for more apps for your iOS devices.

About

Panel Manager

Streamline electrical panel scheduling directly from your mobile device. Quickly add circuit details, automatically calculate loads, and generate professional PDF reports for permits and inspections. Collaborate with your crew in real-time without needing individual accounts.

Highlights
  • Real-time load calculation
  • Automatic space assignment
  • 1-phase and 3-phase support
  • Crew project sharing
  • PDF export for permits
  • Compact door label generation
Features
Read full description

Panel Manager — Electrical Panel Schedules The fastest way to build and manage electrical panel schedules on the jobsite. No laptop. No paper. Just your phone. PANEL SCHEDULES Add circuits with breaker size, poles, phase, and load. Panel Manager auto-assigns spaces, calculates phase loads, and flags overloads in real time. Supports 1-phase and 3-phase panels. CREW SHARING Create a free account and share any project with your crew using a 6-character code. They download the schedule instantly — no account required to join. PDF EXPORT Export a full-size panel schedule PDF for permits and inspections, or a compact door label for the panel pocket. PANEL MANAGER PRO One-time purchase. Unlimited projects and panels, crew sharing, PDF export with company branding. No subscription. No ads. panelmngr.com

Screenshots

Transformer Calculator Plus4 screens
Panel Manager4 screens

Verdict

The call

The clearest difference is price: Panel Manager at Free against Transformer Calculator Plus's $2.99. Panel Manager also leads on rating (5.0 vs 3.3) and update cadence (every 9 days vs every 45 months). Transformer Calculator Plus's advantage is in-app purchases (none vs 1) and ratings volume (4 vs 1). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Panel Manager is free to download; Transformer Calculator Plus costs $2.99 up front. Panel Manager sells 1 one-off in-app purchase. Transformer Calculator Plus asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Panel Manager holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

Transformer Calculator Plus ships an update every 45 months, Panel Manager every 9 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

Scorecard7 real differences · 3 level
Transformer Calculator Plus versus Panel Manager: the parameters behind the verdict, then further details
ParameterTransformer Calculator PlusPanel Manager
Price$2.99Free — better
Rating3.3 (4 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings4 — better1
Update frequencyEvery 45 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.6
Further details — not scored
Size1 MB7 MB
Age rating4+4+
DeveloperNitrioMICHAEL ANTHONY SLOCUM JR

Customer experience

Transformer Calculator Plus

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Panel Manager

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Transformer Calculator Plus

No in-app purchases

1 purchases

Panel Manager

One-time1
  • Panel Manager Pro$9.99

Questions

Is Transformer Calculator Plus free?
Transformer Calculator Plus costs $2.99, with no in-app purchases.
Is Panel Manager free?
Panel Manager is free to download, with in-app purchases available.
Which has better reviews, Transformer Calculator Plus or Panel Manager?
Panel Manager is rated higher. Transformer Calculator Plus averages 3.3 out of 5 from 4 ratings, while Panel Manager averages 5.0 from 1 ratings.
Do Transformer Calculator Plus or Panel Manager have ads?
Neither Transformer Calculator Plus nor Panel Manager shows ads.
Which is updated more often, Transformer Calculator Plus or Panel Manager?
Transformer Calculator Plus ships an update every 45 months, and Panel Manager every 9 days. Most recently, Transformer Calculator Plus was updated on October 24, 2026 and Panel Manager on October 7, 2026.

Other comparisons