Simplex vs Duckier
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Simplex
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Simplexβ’ is a generic tool to support participative observation networks. The Simplexβ’ 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. Simplexβ’ 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. Simplexβ’ 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
Duckier
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Duckier VPN β Your duck on the internet! Duckier, the clever duck, makes sure no one steals your data. Browse for free, anonymously, and without an account β ready instantly, no stress, no sign-up! Features: 100% free VPN β the duck works for you, no subscription. No account & no registration β browse instantly, no paperwork. Fast & reliable β Duckier gets you everywhere, worldwide. Private browsing β your data stays with you, not with others. Borderless internet β the duck opens every door for you. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://duckier.com/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: Simplex at none against Duckier's 2. Simplex also leads on iOS requirement (9.0 vs 15.1). Duckier's advantage is update cadence (fortnightly vs every 4 months). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Duckier sells 2 in-app purchases, starting at $9.99 per month. Simplex asks for nothing beyond the download.
Simplex ships an update every 4 months, Duckier fortnightly. The most recent releases landed on September 25, 2026 and September 28, 2026 respectively.
| Parameter | Simplex | Duckier |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Fortnightly β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPod | iPhone, iPad, iPod β better |
| Requires iOS | 9.0 β better | 15.1 |
| Further details β not scored | ||
| Size | 34 MB | 45 MB |
| Age rating | 4+ | 17+ |
| Developer | ACRI | DUCKIER INTERACTIVE - FZCO |
In-app purchases
Simplex
No in-app purchases
Duckier
- Pro Monthly$9.991 Month
- Pro Yearly$39.991 Year









