smartGEM by Guardian Avionics vs Plen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
smartGEM by Guardian Avionics
Read full descriptionHide full description
Bluetooth connects JPI Engine instruments (730/740/830 and 930) for private Aircraft. This app will connect to Guardian Avionics Model 454 on board the aircraft. Once connected, the pilot can see his real time engine instruments like voltage, RPM, EGT, CHT, Fuel Burn flow…etc. In addition the pilot will receive live data of flight plan and time to distance with the fuel required.
Plen
Track aircraft in real-time with live location updates. See planes as they fly and monitor weather conditions along their routes. Discover various types of aircraft with this intuitive radar tool.
- Real-time ADS-B tracking
- Live aircraft location updates
- Weather updates for flight paths
- Discover different types of aircraft
- Intuitive radar interface
Read full descriptionHide full description
Meet Plen. Plens are in the sky all around us. Track plens with Plen, find plens, see plens. All with Plen. Find fun plens, fast plens, slow plens. Plen. Key Features: Real-Time ADS-B Tracking: Plen location updated in real time. Weather Updates: Watch plens fly through sky poofs. Download Plen.
Screenshots
Verdict
The clearest difference is update cadence: Plen at every 6 days against smartGEM by Guardian Avionics's every 28 months. smartGEM by Guardian Avionics's advantage is iOS requirement (11.0 vs 17.0). 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.
smartGEM by Guardian Avionics ships an update every 28 months, Plen every 6 days. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | smartGEM by Guardian Avionics | Plen |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 28 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 116 MB | 203 MB |
| Age rating | 4+ | 4+ |
| Developer | Co guardian llc | Automata Solutions Ltd. |
In-app purchases
smartGEM by Guardian Avionics
No in-app purchases
Plen
No in-app purchases
Questions
Is smartGEM by Guardian Avionics free?
Is Plen free?
Do smartGEM by Guardian Avionics or Plen have ads?
Which is updated more often, smartGEM by Guardian Avionics or Plen?
Other comparisons
