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Aviation · head to head

AGI STK vs ForeFlight

AGI STK logo

AGI STK

Aviation

Systems Tool Kit for space and aerospace analysis

From
Free
Rated
-
Full reviewWebsite
ForeFlight logo

ForeFlight

Aviation

Comprehensive flight planning and pilot briefing app

From
$130/year
Rated
-
Full reviewWebsite

The short version

  • Only AGI STK has a free tier, so it costs nothing to try first.
  • Each has a real cost: AGI STK sTK is sold as a ladder of separate licences, STK Pro, STK Premium Air, STK Premium Space and STK Enterprise, so mission areas are gated behind different products; ForeFlight device restrictions: 2 iPads and 1 iPhone, or 1 iPad and 2 iPhones per licence
  • They diverge on capability: AGI STK covers Orbit analysis, ForeFlight covers Flight planning.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which AGI STK and ForeFlight actually diverge.

Attributes where AGI STK and ForeFlight differ
AttributeAGI STKForeFlight
Starting priceFree$130/year
Free tierYesNo
PlatformsWindows, LinuxiPad, iPhone
Founded19892007

Identical on both: pricing model (subscription), user rating (Not yet rated), category (Aviation).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in AGI STK

  • Orbit analysis
  • 4D visualization
  • Mission planning
  • Communication analysis
  • Conjunction assessment
  • MATLAB
  • Python
  • C++/.NET API

Only in ForeFlight

  • Flight planning
  • Aeronautical charts
  • Weather briefings
  • Navigation
  • Weight & balance
  • Garmin avionics
  • Jeppesen charts
  • ADS-B receivers

Both cover

  • Data encryption

What people use each for

The jobs each tool is most often brought in to do.

AGI STK

  • Modelling satellite orbits, coverage and conjunction risknot ForeFlight
  • Mission analysis and visualization for air, space and defence systemsnot ForeFlight

ForeFlight

  • Flight planning and navigation for pilotsnot AGI STK
  • Aviation weather and digital logbooknot AGI STK
  • Airport information and terrain profilingnot AGI STK

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

AGI STK

  • STK is sold as a ladder of separate licences, STK Pro, STK Premium Air, STK Premium Space and STK Enterprise, so mission areas are gated behind different products
  • Further capability is sold as separate add-on toolkits including TETK, the RF Channel Modeler and the STK Missile Toolkit
  • Distributing an application built on STK Engine to end users requires each of them to hold an Ansys STK Engine Runtime License
  • Free access is limited to students at accredited institutions and to time-limited trials
  • No price, minimum or cost driver is published for any STK tier

ForeFlight

  • Device restrictions: 2 iPads and 1 iPhone, or 1 iPad and 2 iPhones per licence
  • Geographic region limited to one per subscription
  • Annual billing only, no monthly option
  • Starter plan lacks Synthetic Vision and advanced planning tools
  • Essential plan lacks pre-built aircraft profiles and fuel planning

Pricing, plan by plan

AGI STK

Free
  • STK FreeFree
    • Basic analysis
    • 2D/3D visualization
    • Orbit analysis
  • STK Professional$15000/year
    • Advanced analysis
    • Premium modules
    • API access
  • STK Enterprise$50000/year
    • All modules
    • Multi-user
    • Custom solutions

ForeFlight

$130/year
  • Starter$130/year
    • Student pilots and infrequent flyers
    • Flight planning, weather, VFR/IFR charts
    • Airport information and digital logbook
  • Essential$260/year
    • Most popular option
    • Geo-referenced approaches, synthetic vision
    • Hazard advisor with automatic alerts
  • Premium$390/year
    • Aircraft performance profiles
    • Improved fuel calculations
    • 3D airport views and weather analysis layers

Which should you pick?

Choose AGI STK if

  • You need orbit analysis.
  • You want to start without paying.
  • You work on Windows, Linux.
  • You also want 4d visualization.
AGI STK review

Choose ForeFlight if

  • You need flight planning.
  • You work on iPad, iPhone.
  • You also want aeronautical charts.
ForeFlight review

Questions people ask

Is AGI STK or ForeFlight better?
Neither clearly leads. AGI STK starts at Free and ForeFlight at $130/year, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, AGI STK or ForeFlight?
AGI STK has a free tier; the other does not. Paid plans start at Free for AGI STK and $130/year for ForeFlight.
Does AGI STK or ForeFlight run on more platforms?
AGI STK runs on Windows, Linux. ForeFlight runs on iPad, iPhone.
Can I use AGI STK for free?
Yes. AGI STK has a free tier, so you can try it without paying. ForeFlight starts at $130/year.
What is AGI STK best used for?
AGI STK is most often used for modelling satellite orbits, coverage and conjunction risk, mission analysis and visualization for air, space and defence systems. Of those, modelling satellite orbits, coverage and conjunction risk and mission analysis and visualization for air, space and defence systems are not what ForeFlight is typically brought in for.
What can AGI STK do that ForeFlight cannot?
AGI STK covers Orbit analysis, 4D visualization, Mission planning, Communication analysis. ForeFlight covers Flight planning, Aeronautical charts, Weather briefings, Navigation. Both handle Data encryption.

Answered from the vendors’ own pages

ForeFlight: What is ForeFlight's pricing?

ForeFlight offers three annual subscription tiers: Starter at $130/year, Essential at $260/year (most popular), and Premium at $390/year. All plans are billed annually with no monthly option available.

Source
ForeFlight: How many devices can I use with one ForeFlight license?

One license covers usage on either 2 iPads and 1 iPhone, or 1 iPad and 2 iPhones. One geographic region is included with each plan license.

Source
ForeFlight: What features does the Essential ForeFlight plan include?

The Essential plan ($260/year) is ForeFlight's most popular option. It adds geo-referenced approaches, synthetic vision, hazard advisor with automatic alerts, and terrain/airspace profile views to the Starter features for enhanced safety awareness.

Source
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