Comparison

Fish Doctor vs APLApp

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

Head to head
About

Fish Doctor

This app provides educational tools and e-books on fish diseases, developed by a recognized expert. It features videos demonstrating fish behavior, microscopic observations, and easy-to-understand information for hobbyists and professionals alike.

Highlights
  • Expert-developed fish disease information
  • Educational e-books
  • Informative videos on fish behavior
  • Microscopic observations of pathogens
  • Easy-to-understand language
  • Diagnosis and treatment guidance
Features
Read full description

Fish Doctor contains informative and educational tools on fish diseases. The app’s are made by Dr. Gerald Bassleer (°1954) who is a worldwide recognised expert in fish diseases and trained fish pathobiologist. Since 1977, experience & study & training in the international field of the ornamental fish industry has led to an enormous data base on prevention, diagnosis and treatment of ornamental aquarium and pond fish. All this material has been gathered in e-books with interesting videos to be downloaded for those who are interested to learn about Why? How? When? Where? What? Etc….are there problems with our ‘living jewels’. We show at least 50 videos with the behaviour of the suffering fish with their typical signs of disease. Many microscopic observations on bacteria, fungi and parasites have been included on video. This shows you what is going on with your fish and it is made for those who want to learn to use a microscope (which is NOT difficult). The text and information is written in easy language and technical, difficult language has been avoided. The purpose of “Fish Doctor” is to educate all those who are involved as hobbyist, breeder,collector, exporter, wholesaler or pet shop…to keep fish in better (nearly perfect) condition.

About

APLApp

Access your local library's catalog, manage your account, and discover events and resources on the go. Reserve items, track checkouts, and explore online learning materials from your mobile device.

Highlights
  • Search library catalog
  • Reserve items
  • Manage multiple library accounts
  • View and register for events
  • Access online learning resources
  • View library hours and locations
Features
Read full description

Take the Appleton Public Library everywhere you go! -Search the library catalog and reserve items -Add one or more library accounts to your device, allowing you to manage holds, checkouts and more -View and register for events at the library -See information about hours, locations and services offered -Access online learning resources and so much more!

Screenshots

Fish Doctor4 screens
APLApp4 screens

Verdict

The call

The clearest difference is rating: Fish Doctor at 4.7 against APLApp's 3.4. APLApp's advantage is in-app purchases (none vs 10) and update cadence (every 3 weeks vs every 7 months). On price, ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fish Doctor sells 10 one-off in-app purchases. APLApp asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fish Doctor holds the better App Store score, 4.7 against 3.4. Both are backed by a comparable volume of ratings — 3 and 8 respectively.

UpkeepUpdate frequency

Fish Doctor ships an update every 7 months, APLApp every 3 weeks. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

Scorecard4 real differences · 6 level
Fish Doctor versus APLApp: the parameters behind the verdict, then further details
ParameterFish DoctorAPLApp
PriceFreeFree
Rating4.7 (3 ratings) — better3.4 (8 ratings)
Positive reviews—0.0% of reviews
Number of ratings38 — better
Update frequencyEvery 7 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size30 MB11 MB
Age rating12+4+
DeveloperBassleer BiofishCapira Technologies

Customer experience

Fish Doctor

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

APLApp

All ratings8 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

10 purchases

Fish Doctor

One-time10
  • Fish Diseases - Italian$7.99
  • Fish Diseases - German$7.99
  • Fish Diseases - English$7.99
Show 7 more
  • Fish Diseases - French$7.99
  • Fish Diseases - Dutch$7.99
  • Fish Diseases - Chinese$7.99
  • Fish Diseases - Brazil$7.99
  • The Practical Guide to Fish Diseases$27.99
  • Diseases in marine aquarium fish$27.99
  • The New Illustrated Guide to Fish Diseases$54.99
None

APLApp

No in-app purchases

Questions

Is Fish Doctor free?
Fish Doctor is free to download, with in-app purchases available.
Is APLApp free?
APLApp is free to download, with no in-app purchases.
Which has better reviews, Fish Doctor or APLApp?
Fish Doctor is rated higher. Fish Doctor averages 4.7 out of 5 from 3 ratings, while APLApp averages 3.4 from 8 ratings.
Do Fish Doctor or APLApp have ads?
Neither Fish Doctor nor APLApp shows ads.
Which is updated more often, Fish Doctor or APLApp?
Fish Doctor ships an update every 7 months, and APLApp every 3 weeks. Most recently, Fish Doctor was updated on October 23, 2026 and APLApp on October 29, 2026.

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