Comparison

TakeoffAlert vs Vnav4+

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

Head to head
About

TakeoffAlert

This app monitors your aircraft's takeoff performance in real-time, comparing actual data against planned performance. It provides intuitive feedback on your aircraft's position relative to runway requirements during takeoff.

Highlights
  • Real-time takeoff monitoring
  • Actual vs. planned performance comparison
  • Intuitive data display
  • Input takeoff data (TODA, Roll, Stopping Distance)
  • Monitor takeoff position
Read full description

What is TakeoffAlert? TakeoffAlert is advanced takeoff monitoring app that monitors your takeoff performance through the takeoff event. This data is displayed to the pilot an easy to understand and intuitive format providing value feedback on their aircraft's ACTUAL takeoff performance versus the takeoff planned performance. How does TakeoffAlert work? Simple. 1. Enter your takeoff data: Runway Takeoff Distance Available (TODA); Takeoff Roll; Stopping Distance (see User Guide); Review and Execute the data. 2. When in takeoff position tap the "In Takeoff Position" button to begin monitoring the takeoff. That's it! TakeoffAlert begins monitoring your takeoff, providing realtime feedback about the aircraft is in relation to the runway and the calculated takeoff roll and stop requirements. *** DEVICE REQUIREMENTS *** Wifi ONLY iPads require an EXTERNAL GPS** connected to the iPad (such as Bad Elf Pro). iPod Touch requires an EXTERNAL GPS** connected to the iPod Touch (such as Bad Elf Pro). ** Appareo Stratus 1/2/3 and uAvionix Sentry GPS NOT Supported.

About

Vnav4+

This navigation app offers four specialized calculators for vertical flight path management. It includes tools for general climb/descent rates, instrument procedure descent angles, obstacle departure climb rates, and top of descent calculations.

Highlights
  • Generic rate of climb calculator
  • Generic rate of descent calculator
  • Instrument procedure descent angle calculator
  • Obstacle departure rate of climb calculator
  • Top of descent calculator
Features
Read full description

This is a Vertical Navigation app. it has four different climb or descent calculators. A generic rate of climb and rate of descent calculator. A rate of of descent calculator for those Instrument procedures where there is a published vertical descent angle. An obstacle departure rate of climb calculator. And, a top of descent calculator.

Screenshots

TakeoffAlert4 screens
Vnav4+3 screens

Verdict

The call

The clearest difference is update cadence: Vnav4+ at daily against TakeoffAlert's every 9 months. TakeoffAlert's advantage is iOS requirement (15 vs 17.0). On price, rating, ratings volume and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for TakeoffAlert against 5.0 for Vnav4+. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

TakeoffAlert ships an update every 9 months, Vnav4+ daily. The most recent releases landed on October 6, 2026 and October 17, 2026 respectively.

Scorecard2 real differences · 7 level
TakeoffAlert versus Vnav4+: the parameters behind the verdict, then further details
ParameterTakeoffAlertVnav4+
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Number of ratings2 — better1
Update frequencyEvery 9 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15 — better17.0
Further details — not scored
Size15 MB5 MB
Age rating4+17+
DeveloperRaymond ChaseWilliam Downing

Customer experience

TakeoffAlert

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Vnav4+

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

In-app purchases

None

TakeoffAlert

No in-app purchases

None

Vnav4+

No in-app purchases

Questions

Is TakeoffAlert free?
TakeoffAlert is free to download, with no in-app purchases.
Is Vnav4+ free?
Vnav4+ is free to download, with no in-app purchases.
Which has better reviews, TakeoffAlert or Vnav4+?
TakeoffAlert and Vnav4+ are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do TakeoffAlert or Vnav4+ have ads?
Neither TakeoffAlert nor Vnav4+ shows ads.
Which is updated more often, TakeoffAlert or Vnav4+?
TakeoffAlert ships an update every 9 months, and Vnav4+ daily. Most recently, TakeoffAlert was updated on October 6, 2026 and Vnav4+ on October 17, 2026.

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