Comparison

A&P PRO vs Second Phone Number

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

Head to head
About

A&P PRO

This app provides essential calculations and reference tools for aircraft airframe and powerplant mechanics. It covers sheet metal, weight and balance, basic electricity, aviation science, and unit conversions, drawing data from FAA AC43-13b. Designed for students and professionals in aviation maintenance.

Highlights
  • Sheet Metal calculations
  • Weight and Balance calculations
  • Basic Electricity formulas
  • Aviation Science principles
  • Unit Conversion calculator
  • Reference data from FAA AC43-13b
Features
Read full description

Airframe and PowerPlant Professional (A&P PRO) This app assists the aircraft airframe and powerplant (A&P) mechanic in determining common measurements in several subject matter areas. Source for formulae is FAA AC43-13b. It is designed for students enrolled in an FAA Part 147 Maintenance Technician School. Instructors at such schools will also benefit from its use as will graduate mechanics. It has been formatted for iPhones with 5.5" screens or greater as well as 7" and 10" tablets. A tablet is the ideal device. Sheet Metal: - Setback - Developed Width - Rivet Size - Bend Allowance Weight and Balance: - Basic Empty Weight Center of Gravity (CG) - CG Adjustments using Ballast and/or Weight Shift - CG Adjustment due to Alterations - Min/Max CG limits from Adverse Loading Basic Electricity - Resistor Color Codes (by Color Band and by Value) - Ohm's Law Demonstrator - Impedance Circuits - Voltage/Current Divider Circuits - Component (resistor, capacitor, inductor) Addition (parallel/series) - Reactance Computations - Frequency, Period and Wavelength calculator Aviation Science - Levers (Class I, II, III, Inclined Plane) - Gas Laws (Boyles, Charles, Lussacs and Combined) Unit Conversion Calculator - Length - Power - Area - Volume - Weight - Temperature - Speed - Data Storage - Angle - Time Disclaimer The user of A&P PRO for any specific application without an independent verification of its accuracy does so at his/her own risk and assumes any and all liability resulting from such use. No warranty is offered as to the accuracy of results. Users should have a thorough understanding of the relevant theoretical criteria. A&P PRO Copyright 2024 TurboSoftSolutions

About

Second Phone Number

Obtain a secondary phone number for calls and texts without needing an extra SIM card. Use it for personal or professional purposes, including online marketplaces, dating, and business, while keeping your primary number private. Make affordable international calls and send SMS/MMS with this virtual line.

Highlights
  • Obtain a secondary phone number
  • Make calls and send texts
  • No additional SIM card needed
  • Maintain privacy
  • Affordable international calls
  • Send SMS/MMS
Features
Read full description

Get a virtual US or Canadian phone number in minutes! No extra SIM card or second phone needed. Choose a California, Texas, Florida, New York, Illinois, or another available area code. Call and text from your virtual number over Wi-Fi or mobile data. Call mobile and landline numbers in the US, Canada, and 200+ countries worldwide. Send and receive SMS, and share photos and image through MMS. A SEPARATE NUMBER FOR EVERYDAY COMMUNICATION - Keep your personal and business communication organized with a separate US or Canadian phone number. Perfect for: - Work and business communication; - Customers and clients; - Travel and international communication; - Friends and family; - Personal and business calls and messages. FEATURES - A US or Canadian virtual phone number; - A choice of available local area codes; - Wi-Fi calling; - Calls to mobile and landline numbers; - International calls to supported destinations; - SMS and MMS in the US and Canada; - Photo sharing through MMS; - Contact sync. An active subscription is required to get and use a virtual phone number. Calling and messaging availability may vary by destination and carrier. - Terms of Use: https://sphone.telecom.municorn.com/privacy?app=second-phone - Privacy Policy: https://sphone.telecom.municorn.com/terms?app=second-phone - CCPA: https://telecom.municorn.com/ccpa?app=second-phone - Privacy Supplement: https://telecom.municorn.com/privacy-supplement?app=second-phone - Messaging Policy: https://sphone.telecom.municorn.com/messaging-policy?app=second-phone

Screenshots

A&P PRO4 screens
Second Phone Number4 screens

Verdict

The call

The clearest difference is rating: A&P PRO at 5.0 against Second Phone Number's 4.3. A&P PRO also leads on review sentiment (100% vs 64%) and in-app purchases (none vs 10). Second Phone Number's advantage is ratings volume (924 vs 3) and chart position (#145 vs unranked). On price, update cadence, 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

Both are free to download. Second Phone Number sells 10 in-app purchases, starting at $9.99 per 7 days. A&P PRO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

A&P PRO holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Second Phone Number has 924 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of A&P PRO's written reviews are positive against 64% of Second Phone Number's.

UpkeepUpdate frequency

A&P PRO ships an update every 3 weeks, Second Phone Number fortnightly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

Scorecard7 real differences · 4 level
A&P PRO versus Second Phone Number: the parameters behind the verdict, then further details
ParameterA&P PROSecond Phone Number
PriceFreeFree
Rating5.0 (3 ratings) — better4.3 (924 ratings)
Positive reviews100.0% of reviews — better64.0% of reviews
Number of ratings3924 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#145 — better
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better18.0
Further details — not scored
Size18 MB126 MB
Age rating4+4+
DeveloperNeil RohanMunicorn Limited

Customer experience

A&P PRO

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Second Phone Number

All ratings911 ratings
Positive83.4%
Neutral1.5%
Negative15.0%
Written reviews325 reviews
Positive64.0%
Neutral2.2%
Negative33.8%

Bugs and requests

A&P PRO

Not enough reviews yet to summarise bugs or requests.

Second Phone Number

Reported bugs

3 issues
  • Inability to send/receive messages or make calls
  • Crashes when trying to link contacts
  • Verification codes not being delivered

Requested features

4 requests
  • Ability to change phone numbers more frequently
  • Support for more social media and messaging apps
  • Option to delete text message history
  • Local phone number availability for international users

In-app purchases

None

A&P PRO

No in-app purchases

10 purchases

Second Phone Number

Subscriptions8
  • Second Phone Premium (week)7 Days trial$9.997 Days
  • Second Phone Premium (week)$9.997 Days
  • Second Phone Premium (week)$14.997 Days
Show 5 more
  • Second Phone Number: Call Text$14.997 Days
  • Monthly Trial3 Days trial$29.991 Month
  • Second Phone Premium (month)$29.991 Month
  • Second Phone Premium (quarter)$49.993 Months
  • Second Phone Premium (yearly)3 Days trial$95.991 Year
One-time2
  • Change number$4.99
  • Change Number 2+$7.99

Questions

Is A&P PRO free?
A&P PRO is free to download, with no in-app purchases.
Is Second Phone Number free?
Second Phone Number is free to download, with in-app purchases available.
Which has better reviews, A&P PRO or Second Phone Number?
A&P PRO is rated higher. A&P PRO averages 5.0 out of 5 from 3 ratings, while Second Phone Number averages 4.3 from 924 ratings.
Do A&P PRO or Second Phone Number have ads?
Neither A&P PRO nor Second Phone Number shows ads.
Which is updated more often, A&P PRO or Second Phone Number?
A&P PRO ships an update every 3 weeks, and Second Phone Number fortnightly. Most recently, A&P PRO was updated on November 3, 2026 and Second Phone Number on November 7, 2026.

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