umlaut Feedback vs FlexSpec Backpack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
umlaut Feedback
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This app is shared with you by invitation of umlaut insight GmbH. Anyone else who found it in the store is of course welcome to install it, too. However, there is no specific support offered.
FlexSpec Backpack
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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
Screenshots
Verdict
The clearest difference is update cadence: umlaut Feedback at every 2 months against FlexSpec Backpack's every 24 months. FlexSpec Backpack's advantage is iOS requirement (9.3 vs 14.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
umlaut Feedback ships an update every 2 months, FlexSpec Backpack every 24 months. The most recent releases landed on September 17, 2026 and September 10, 2026 respectively.
| Parameter | umlaut Feedback | FlexSpec Backpack |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months — better | Every 24 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 | 9.3 — better |
| Further details — not scored | ||
| Size | 8 MB | 140 MB |
| Age rating | 4+ | 4+ |
| Developer | Umlaut communications GmbH | Bubble Technology Industries |
In-app purchases
umlaut Feedback
No in-app purchases
FlexSpec Backpack
No in-app purchases
Questions
Is umlaut Feedback free?
Is FlexSpec Backpack free?
Do umlaut Feedback or FlexSpec Backpack have ads?
Which is updated more often, umlaut Feedback or FlexSpec Backpack?
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