Comparison

PD Altitude vs Heli

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

Head to head
About

PD Altitude

Features
Read full description

If you struggle to work out PRESSURE and DENSITY altitudes then this simple calculator is for you. Simply slide 'Choppy' up and down to set your height and move the pressure and temperature sliders and the calculator will deliver the answer. For added accuracy, you can even type the numbers in from your keyboard! If you want to support the developer there is an In-App purchase that will enable automatic calculation based on your current location. Cool eh? ARE YOU TRAINING TO BECOME A PILOT? PD Altitude also has a small training section giving you an easy 5-Step process for calculating your altitudes. Enjoy this version and feel free to leave a comment in the review if you found this useful. For the Terms of Use (EULA) for this application please refer to Apple's Standard Licensed Application End User Agreement at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ View PitchLinks terms & conditions and privacy policy: https://www.pitchlinks.co.nz/privacy

About

Heli

Features
Read full description

Run safer, smarter helicopter operations with Heli-X — one connected platform for pilots, operators and MROs. Replace scattered paperwork and disconnected records with a clear, current view of every flight, aircraft and maintenance action. eFDR — ELECTRONIC FLIGHT RECORDS • Record flight, engine and airframe time counters • Be alert! - In Flight Traffic Monitoring System with visual display • Capture fuel usage, cycles, activity and GPS flight history • Generate clear flight summaries and export accurate records • Monitor SAR Time with overdue-flight alerts • Review and sign off electronic flight records MAINTENANCE & AIRWORTHINESS • Log maintenance items and track them from creation to sign-off • Keep a transparent, time-stamped maintenance history • Search for Airworthiness Directives and link them to aircraft • Track upcoming inspections, compliance and aircraft status • Securely share maintenance data with your connected MRO DEFECTS & OBSERVATIONS • Record defects and operational observations as they happen • Add photos, notes, urgency and status • Assign items to your MRO and follow progress through resolution • Preserve a complete audit trail TREND DATA & POWER CHECKS • Record configurable engine trend data • Capture aircraft power checks from linked templates • Monitor limits, margins and performance trends • Attach supporting documents and export reports FLEET & CREW OPERATIONS • View fleet status, alerts and activity in one dashboard • Track flight and duty records • Keep working offline and sync when connectivity returns • Give pilots, operators and MROs a shared source of truth From a single aircraft to a growing fleet, Heli-X helps your team stay informed, coordinated and ready to fly. Features may vary by subscription, role and region.

Screenshots

PD Altitude4 screens
Heli4 screens

Verdict

The call

The clearest difference is in-app purchases: Heli at none against PD Altitude's 1. On price, update cadence, ads and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. PD Altitude sells 1 one-off in-app purchase. Heli asks for nothing beyond the download.

UpkeepUpdate frequency

PD Altitude ships an update every 4 weeks, Heli every 2 weeks. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.

Scorecard1 real difference Ā· 5 level
PD Altitude versus Heli: the parameters behind the verdict, then further details
ParameterPD AltitudeHeli
PriceFreeFree
Update frequencyEvery 4 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better16.4
Further details — not scored
Size22 MB66 MB
Age rating17+4+
DeveloperPITCHLINKS LIMITEDGSD FIRST PTY LTD

In-app purchases

1 purchases

PD Altitude

One-time1
  • My Location$1.99
None

Heli

No in-app purchases

Questions

Is PD Altitude free?
PD Altitude is free to download, with in-app purchases available.
Is Heli free?
Heli is free to download, with no in-app purchases.
Do PD Altitude or Heli have ads?
Neither PD Altitude nor Heli shows ads.
Which is updated more often, PD Altitude or Heli?
PD Altitude ships an update every 4 weeks, and Heli every 2 weeks. Most recently, PD Altitude was updated on November 7, 2026 and Heli on November 9, 2026.

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