Simplex vs Cobra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simplex
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Simplex™ is a generic tool to support participative observation networks. The Simplex™ smart app is one component of a more complete observation system that, in addition to the app, comprises a webGIS interface and a database. The application allows you to do any kind of thematic observation by driving the observers step by step, through explicit icons, to the right observation item, and to finally declare it (with our without photo) with geographical and spatial stamp. Observers have access at any time and any location to environmental data for the last three days that are extracted on-demand from environmental databases. At each observation are attached selected environmental parameters that allows, at any time, to correlate some observations with environmental context. Simplex™ can host several observation networks, either of public type (i.e. open to anyone) or of private type. You can contract a license for a private one to create your own network. The license covers the configuration of the observation campaign (i.e. the selection and the hierarchy of icons and the required environmental parameters, if of interest to you). It also covers an access to a private webGIS that provides a synoptic view of the observation done by your network. Your data is kept safely on a private storage without any access by a third-party. Once created you can invite anyone you want to become an observer to your network. You can also easily change and adapt the icons at all time. The app allows on-line discussion (text) between network organizer and observers. Simplex™ app is available in several languages (Arabic, English, French, German, Italian, Norwegian and Spanish). Want to create your own network or need for more information? Please contact simplex@acri.fr
Cobra
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Take control of your lawn with Cobra. The smartest way to manage your robotic lawn mower.
Screenshots
Verdict
The clearest difference is update cadence: Cobra at every 6 weeks against Simplex's every 4 months. Simplex's advantage is iOS requirement (9.0 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Simplex ships an update every 4 months, Cobra every 6 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.
| Parameter | Simplex | Cobra |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 34 MB | 63 MB |
| Age rating | 4+ | 9+ |
| Developer | ACRI | Henton and Chattell Ltd. |
In-app purchases
Simplex
No in-app purchases
Cobra
No in-app purchases









