Comparison

avvistAPP vs Zanzero

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

Head to head
About

avvistAPP

Features
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AVVISTAPP is an app designed to track the presence of the sea walnut - an alien species in the northern Adriatic. Although the sea walnut does not sting humans (it is a ctenophore and not a jellyfish), this animal can be considerably problematic for the marine ecosystem: it is a voracious predator that feeds on zooplankton (fish food), eggs and fish larvae. Due to the negative effects that the sea walnut can cause in the locations in which it is found, it has been included in the list of the 100 most harmful invasive species in the world. Since the summer of 2016, the sea walnut has been forming huge swarms (blooms) in the north Adriatic, causing serious problems for the fishing sector in the Grado and Marano lagoons. AVVISTAPP is a tool that will allow everyone to actively contribute to monitoring the sea walnut invasion in the Gulf of Trieste. In order to use to it: recognise the organism, if possible take a photo and then send an alert via your mobile phone. In addition to the sea walnut, with AVVISTAPP, it is also possible to report other very common organisms in our sea, such as jellyfish, turtles and dolphins. The data provided will be collected and analysed by OGS researchers and will be made available to the entire scientific community in order to better understand our sea conditions.

About

Zanzero

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Con i sistemi Zanzero finalmente non dovrete piΓΉ rinunciare all’aria aperta e potrete godervi l’estate senza zanzare, gestendo gli impianti installati tramite app

Screenshots

avvistAPP3 screens
Zanzero3 screens

Verdict

The call

The clearest difference is device support: avvistAPP at 2 against Zanzero's β€”. Zanzero's advantage is iOS requirement (15.6 vs 17.6). On price, update cadence and in-app purchases 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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

avvistAPP ships an update every 10 months, Zanzero every 6 months. The most recent releases landed on October 1, 2026 and October 5, 2026 respectively.

Scorecard2 real differences Β· 4 level
avvistAPP versus Zanzero: the parameters behind the verdict, then further details
ParameteravvistAPPZanzero
PriceFreeFree
Update frequencyEvery 10 monthsEvery 6 months β€” better
AdsNoβ€”
In-app purchasesNoNo
DevicesiPhone, iPad β€” betterβ€”
Requires iOS17.615.6 β€” better
Further details β€” not scored
Size11 MB46 MB
Age rating4+9+
DeveloperDivulgando SrlGAMMA SISTEMI SAS DI PEDRAZZOLI ROBERTO E C.

In-app purchases

None

avvistAPP

No in-app purchases

None

Zanzero

No in-app purchases

Questions

Is avvistAPP free?
avvistAPP is free to download, with no in-app purchases.
Is Zanzero free?
Zanzero is free to download, with no in-app purchases.
Which is updated more often, avvistAPP or Zanzero?
avvistAPP ships an update every 10 months, and Zanzero every 6 months. Most recently, avvistAPP was updated on October 1, 2026 and Zanzero on October 5, 2026.

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