Comparison

Average ISA Deviation vs Jeppesen Aviator

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

Head to head
About

Average ISA Deviation

This utility helps professional pilots quickly calculate average ISA temperature deviation for descent planning on specific aircraft models. It simplifies manual calculations, reduces workload, and operates offline, making it ideal for cockpit use.

Highlights
  • Calculate average ISA deviation
  • Reduce descent planning workload
  • Simplify manual calculations
  • Offline cockpit use
  • Designed by a pilot
Features
Read full description

Average ISA Deviation is a fast and precise utility designed for pro pilots who need to calculate the average ISA temperature deviation to correctly enter the DES FORECAST in the FMC of the Boeing 737 (NG / MAX) and other aircraft. The app allows you to: • Quickly calculate the average ISA deviation • Reduce workload and potential errors during descent planning • Simplify calculations that are normally done manually • Work fully offline, ideal for cockpit use Designed by a pilot, for pilots. Legal Disclaimer This application is intended as an advisory and informational tool only. It does not replace official aeronautical charts, flight planning systems, company procedures, or regulatory guidance.

About

Jeppesen Aviator

This comprehensive flight management tool offers pilots a centralized hub for essential Electronic Flight Bag (EFB) functions. It streamlines workflows with configurable modules for briefings, navigation logs, documents, and performance data, integrating seamlessly with other aviation applications.

Highlights
  • Centralized EFB tools
  • Configurable dashboard module
  • Electronic briefing and navlog
  • Digital document viewer
  • Flight optimization
  • Device-to-device data sharing
Read full description

Aviator is an all-in-one application that provides centralized access to a seamless, integrated suite of EFB tools, with an intuitive, simple interface, and streamlined workflow. Its configurable modules display critical information from various sources, can be monitored at a glance, and includes: • Dashboard module • Briefing module • NavLog module • Documents module • Tools module • Charts and Navigation integration with FliteDeck Pro (FD Pro) • Performance integration with Onboard Performance Tool (OPT) • Flight Optimization • Company own applications* *Integrates with any integrated EFB application, Ground Web Service (GWS), Dynamic Data Distribution (D3), or FliteBrief providing AIRINC 633-1 or 633-2 formatted flight folders. Do it right. Do it once. Aviator reduces the need for manual data re-entry by sharing and synchronizing data between integrated applications. This not only saves pilots time in the cockpit but also reduces the potential of human input error. Aviator helps keep your operational risks to a minimum by combining four-fold backup redundancies to keep your fleet moving. Cloud-based navigation data assures the industry’s highest data accessibility. The integration of Jeppesen’s “Trip Kit on Demand” gives operators a backup service which assures their pilots always have the charts needed to keep your fleet moving safely – even when other data providers fail. And if a pilot is unable to update their device, Aviator’s device-to-device sharing service allows other crew members to share their flight plans, flight information, navigation logging actuals, and even Trip Kits – right in the cockpit. Aviator customers naturally have access to Jeppesen’s 24/7/365 world-class support service. Aviator Features: •Dashboard Module o Flight Summary o Weather Summary and Raw/Decoded Detailed Weather o Airport NOTAMs and Airport Data o Links to FliteDeck Pro Charts and Navigation o Route Map with Weather Overlay o Links to commonly accessed features •Briefing Module o Transforms the pilot briefing and navigation logging process into a fully electronic format available anywhere there is connectivity. o Review and sign your flight plan, NOTOCs, Loadsheets, and Journey Logs. o Review planned and estimated values in your AIRINC 633 formatted flight folders. o Review dispatched weather, NOTAMs, and other airline documents submitted in the flight package. o Retrieve real-time textual weather (METARs, TAFs, SIGMETs, AIRMETs, and PIREPs) o Retrieve weather charts (prognostic, hazards, winds, radar/satellite) for up-to-date weather. o Create and submit a journey log for your trip. o Capture Performance data from 3rd party applications. •NavLog Module o Enter actual waypoint navigation metadata as you fly. o Route map with weather overlays •Documents Module o View traditional paper-based airplane and airline documents in a fully digital format with a powerful document viewer which allows for indexing, bookmarking, highlighting, annotating, printing, and displaying in night mode. o Reconcile your annotations to a newer version of your document. o Distribute electronic form templates that can be filled out and submitted with your closeout report for each flight to create your own customized, form-assisted, business processes. •Tools Module o Unit Conversion Tool o Calculator o Timer o Stopwatch o De-icing Hold-over Timer o Flight Computer

Screenshots

Average ISA Deviation2 screens

Verdict

The call

The clearest difference is review sentiment: Average ISA Deviation at 67% against Jeppesen Aviator's 0%. Jeppesen Aviator's advantage is price (Free vs $3.99) and rating (4.9 vs 3.5). On ads, in-app purchases 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

Jeppesen Aviator is free to download; Average ISA Deviation costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Jeppesen Aviator holds the better App Store score, 4.9 against 3.5. That said, the two scores are not equally well evidenced: Jeppesen Aviator has 15 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 67% of Average ISA Deviation's written reviews are positive against 0% of Jeppesen Aviator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Average ISA Deviation ships an update every 14 months, Jeppesen Aviator every 3 months. The most recent releases landed on August 1, 2026 and August 27, 2026 respectively.

Scorecard7 real differences · 3 level
Average ISA Deviation versus Jeppesen Aviator: the parameters behind the verdict, then further details
ParameterAverage ISA DeviationJeppesen Aviator
Price$3.99Free — better
Rating3.5 (2 ratings)4.9 (15 ratings) — better
Positive reviews66.7% of reviews — better0.0% of reviews
Number of ratings215 — better
Update frequencyEvery 14 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad — betteriPad
Requires iOS26.116.0 — better
Further details — not scored
Size1 MB284 MB
Age rating4+4+
DeveloperJuan Mauricio Padilla VillarrealJeppesen

Customer experience

Average ISA Deviation

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Jeppesen Aviator

All ratings15 ratings
Positive93.3%
Neutral6.7%
Negative0.0%
Written reviews7 reviews
Positive0.0%
Neutral28.6%
Negative71.4%

In-app purchases

None

Average ISA Deviation

No in-app purchases

None

Jeppesen Aviator

No in-app purchases

Questions

Is Average ISA Deviation free?
Average ISA Deviation costs $3.99, with no in-app purchases.
Is Jeppesen Aviator free?
Jeppesen Aviator is free to download, with no in-app purchases.
Which has better reviews, Average ISA Deviation or Jeppesen Aviator?
Jeppesen Aviator is rated higher. Average ISA Deviation averages 3.5 out of 5 from 2 ratings, while Jeppesen Aviator averages 4.9 from 15 ratings.
Do Average ISA Deviation or Jeppesen Aviator have ads?
Neither Average ISA Deviation nor Jeppesen Aviator shows ads.
Which is updated more often, Average ISA Deviation or Jeppesen Aviator?
Average ISA Deviation ships an update every 14 months, and Jeppesen Aviator every 3 months. Most recently, Average ISA Deviation was updated on August 1, 2026 and Jeppesen Aviator on August 27, 2026.

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