Comparison

FlexSpec Backpack vs Astro Track

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

Head to head

Your Ultimate ISS Guide

Free

🔧 Utilities

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About

FlexSpec Backpack

Features

Read full description

The FlexSpec Backpack app provides the user interface for the FlexSpec Backpack product, which provides radiation detection, radionuclide identification, and categorization of radioactive material in a portable form factor. Use the app to: - View real-time information from gamma and neutron detectors, including count rates and dose rates - View real-time alarm information, including radionuclide identification, source categorization, and direction to the source - View detailed information associated with each alarm, including spectroscopic data and GPS location - Send data from each alarm directly to a supervisor or dedicated reachback center - View status information from the hardware, including any fault conditions - Send technical support requests directly to the manufacturer Learn more at: www.bubbletech.ca

About

Astro Track

Track the International Space Station's live location on a map. Get real-time updates and see its path across the globe. A must-have for space enthusiasts and anyone curious about our planet from above.

Highlights

Live ISS tracking on map
Real-time location updates
Global path visualization
Space station information

Features

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Follow live on the map International space station.

Screenshots

FlexSpec Backpack1 screens

Astro Track3 screens

Verdict

The call

The clearest difference is update cadence: FlexSpec Backpack at every 24 months against Astro Track's every 56 months. FlexSpec Backpack also leads on iOS requirement (9.3 vs 15.0). On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

FlexSpec Backpack ships an update every 24 months, Astro Track every 56 months. The most recent releases landed on October 14, 2026 and October 20, 2026 respectively.

Scorecard2 real differences · 6 level

FlexSpec Backpack versus Astro Track: the parameters behind the verdict, then further details
Parameter	FlexSpec Backpack	Astro Track
Price	Free	Free
Positive reviews	—	0.0% of reviews
Update frequency	Every 24 months — better	Every 56 months
Ads	No	No
In-app purchases	No	No
Monetization	—	Free
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	9.3 — better	15.0
Further details — not scored
Size	140 MB	14 MB
Age rating	4+	4+
Developer	Bubble Technology Industries	Aminjoni Abdullozoda

In-app purchases

None

FlexSpec Backpack

No in-app purchases

None

Astro Track

No in-app purchases

Questions

Is FlexSpec Backpack free?

FlexSpec Backpack is free to download, with no in-app purchases.

Is Astro Track free?

Astro Track is free to download, with no in-app purchases.

Do FlexSpec Backpack or Astro Track have ads?

Neither FlexSpec Backpack nor Astro Track shows ads.

Which is updated more often, FlexSpec Backpack or Astro Track?

FlexSpec Backpack ships an update every 24 months, and Astro Track every 56 months. Most recently, FlexSpec Backpack was updated on October 14, 2026 and Astro Track on October 20, 2026.