What is the best alternative to Catchr: Fish Identifier on iPhone?

Aquarium Guide Fish Identifier, S tier, #1 in fish identification.

Is there a free alternative to Catchr: Fish Identifier?

Yes: Aquarium Guide Fish Identifier (S tier, #1) is free to download, with in-app purchases.

Yes. 1 app ranks above it in fish identification: Aquarium Guide Fish Identifier (#1).

Catchr: Fish Identifier is A tier, #2 of the 6 tiered apps in fish identification. Here is everything that competes with it on iPhone, in tier order.

1
Aquarium Guide Fish IdentifierShigher tier
Free + IAP · ★ 4.2 · 26,529 ratings · score 87
Helps plan a freshwater or saltwater aquarium by checking fish compatibility, stocking levels, and fish care details.
3
FishVerify: ID & RegulationsA
Free + IAP · ★ 4.6 · 2,313 ratings · score 84
Identifies fish from a camera photo and lists local fishing size, bag limits and season rules based on GPS location.
4
Picture Fish - Fish IdentifierB
Free + IAP · ★ 4.4 · 6,868 ratings · score 76
Identifies fish from a photo or upload and offers fish-keeping tips and a species database.
5
Fish Identifier by pictureF
Free + IAP · ★ 3.7 · 3 ratings · score 41
Uses AI to identify fish species from an uploaded photo and provides detailed information about the fish.
6
Fish Identifier: AI ScannerF
Free + IAP · ★ 4.6 · 189 ratings · score 39
Free reference app that identifies fish species from photos and offers species information and fish-finding tips.

What is the best alternative to Catchr: Fish Identifier on iPhone?: Aquarium Guide Fish Identifier, S tier, #1 in fish identification.
Is there a free alternative to Catchr: Fish Identifier?: Yes: Aquarium Guide Fish Identifier (S tier, #1) is free to download, with in-app purchases.
Does anything rank above Catchr: Fish Identifier?: Yes. 1 app ranks above it in fish identification: Aquarium Guide Fish Identifier (#1).