# ΔΙΟΔΙΑ vs Fish Planet

The clearest difference is review sentiment: ΔΙΟΔΙΑ at 100% against Fish Planet's 9%. ΔΙΟΔΙΑ also leads on rating (5.0 vs 3.7) and in-app purchases (none vs 6). Fish Planet's advantage is ratings volume (142 vs 1) and iOS requirement (15.6 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Fish Planet sells 6 in-app purchases, starting at $0.99 per month. ΔΙΟΔΙΑ asks for nothing beyond the download.

ΔΙΟΔΙΑ holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Fish Planet has 142 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of ΔΙΟΔΙΑ's written reviews are positive against 9% of Fish Planet's.

ΔΙΟΔΙΑ ships an update every 12 months, Fish Planet every 11 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ΔΙΟΔΙΑ | Fish Planet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id823274044/reviews)** | [3.7 (142 ratings)](https://appshunter.io/ios/app/fish-planet/id954203652/reviews) |
| Number of ratings | 1 | **142** |
| Positive reviews | **100.0% of reviews** | 8.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 11 months** |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 757 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nik Psaragathos](https://appshunter.io/developer/468652364) | [Web and Print](https://appshunter.io/developer/517696765) |

## What reviewers say

### ΔΙΟΔΙΑ

[App page](https://appshunter.io/ios/app/id823274044)

**In-app purchases:** none


### Fish Planet

[App page](https://appshunter.io/ios/app/fish-planet/id954203652)

A comprehensive fish encyclopedia and fishing guide in 50 languages. Discover detailed information on 800 fish species, including their habitats, feeding habits, and optimal fishing conditions. Includes helpful tools like a fisherman's calendar and knot guides.

**Highlights:** 800 fish species encyclopedia, Multi-language support (50 languages), Detailed fish profiles, Fisherman's calendar, Fisherman's watch for fish activity, Fishing knots guide, Fisherman's navigator with catch logging

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Subscription - «‎Premium» | $0.99 | per month |
| Subscription - «‎Premium» | $9.99 | per year |
| Fishes of North America | $4.99 | one-time |
| Fishes of Europe and Asia | $4.99 | one-time |
| Fishes of the seas and oceans | $4.99 | one-time |
| All-in-one | $9.99 | one-time |


## Frequently asked questions

### Is ΔΙΟΔΙΑ free?

ΔΙΟΔΙΑ is free to download, with no in-app purchases.

### Is Fish Planet free?

Fish Planet is free to download, with in-app purchases available.

### Which has better reviews, ΔΙΟΔΙΑ or Fish Planet?

ΔΙΟΔΙΑ is rated higher. ΔΙΟΔΙΑ averages 5.0 out of 5 from 1 ratings, while Fish Planet averages 3.7 from 142 ratings.

### Do ΔΙΟΔΙΑ or Fish Planet have ads?

Fish Planet shows ads; ΔΙΟΔΙΑ does not.

### Which is updated more often, ΔΙΟΔΙΑ or Fish Planet?

ΔΙΟΔΙΑ ships an update every 12 months, and Fish Planet every 11 months. Most recently, ΔΙΟΔΙΑ was updated on October 20, 2026 and Fish Planet on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*