Comparison

AquaCalculator vs EggHatching

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

Head to head
About

AquaCalculator

This app helps dedicated marine aquarists manage and document their aquariums. It tracks water parameters, manages animal stock, and calculates precise salt and nutrient additions. It also offers tools for adjusting calcium, alkalinity, and magnesium levels.

Highlights
  • Manage multiple aquariums
  • Water value documentation with graphs and tables
  • Animal administration with notes and pictures
  • Recurrent memory for care tasks
  • Salt quantity estimation
  • Nutrient and chemical adjustment calculators
  • Extensive setting options
Features
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The reference software for dedicated marine aquarists The AquaCalculator is not free. In order to be able to use the AquaCalculator permanently, you must complete a paid subscription after two weeks. In the first two weeks, the AquaCalculator can be tested for free and the subscription can be stopped at any time before it is chargeable. The app for documentation and management of your aquarium. The main focus is on saltwater aquariums but also their freshwater pools can of course be documented with the AquaCalculator. With the AquaCalculator you have the suitable manager at your fingertips to keep an eye on all important parameters regarding the care of your aquarium. A big request: unfortunately we can not respond to reviews. If you have problems with the app, please contact us via email shortly (Support). So far we could clarify every question :-) The reference software for every dedicated marine aquarist: - Manage several basins in parallel - Documentation of the water values ​​in graph and table form per pool. You can document your water readings, take notes or deposit pictures. The pictures can also be commented on. - Animal Administration. You can also assign notes and pictures to your animals in the basin and thus get a quicker overview of the development of their stock. - Dates: Management of recurrent memories help to keep track of the care of aquariums - Realistic estimation of the required salt quantity of commercially available sea salt mixtures. How much salt is actually needed to "adjust the salt content" or for the next "water change"? AquaCalculator calculates this using self-determined measurements of almost all commercially available sea salt mixtures. - Addition of nutrients (nitrate and phosphate) - Calculator to adjust calcium / alkalinity / magnesium: Expensive special agents are passé. AquaCalculator calculates the exact dosing quantities and stock solutions required for the adjustment of calcium, alkalinity (KH) and Mg concentration of low-cost salts. Supports recipes from Aquafair, Aquaforest, Coral-Care, Fauna Marin, MT Aquaristics, Nyos, H.W. Balling, Price Aquaristics, A.Glaser, Red Sea, Sangokai, Tropic Marin, Fritz ProAquatics, Two Little Fishies, Kent Marine, Seachem, Brightwell, Continuum Aquatics, ESV and Self-Defined. - Extensive setting options for the measuring instruments used, as well as the chem. Recipes. - Mini-FAQ: answers the most important questions about adjusting the water values ​​and thus the successful care of reef aquariums. Including ten thousand times downloaded seawater FAQs by Martin Kuhn (Water Parameter FAQ, Anemone FAQ, Plague Master FAQs 1 and 2) NOTE: We have provided iBooks from Apple for viewing the Seawater FAQs. The ad must have iBooks or another PDF viewing app installed on your device. To use the AquaCalculator you must have a valid subscription. This will enable you to take full advantage of the Aquacalculator, benefit from regular updates and enhancements, secure data storage and synchronization of your data with other devices. Without a valid subscription, you can only read but not modify your data. The term is one year. Payment will be made through your iTunes account. The subscription will automatically renew if it is not canceled 24 hours before the end of the current period. Within 24 hours before the end of the current period, the amount for the renewal will be charged. Termination of automatic renewal is possible at any time. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Use and Privacy: https://acalc.de/pages/impressum

About

EggHatching

Easily track egg incubation with daily reminders for turning and candling. Document key dates from start to hatch. Ideal for hobby breeders aiming for successful chick hatching.

Highlights
  • Incubation process tracking
  • Daily turning reminders
  • Candling documentation
  • Important date tracking
  • Hatching planning
Features
Read full description

The Egg Hatching App helps you easily and clearly track the incubation process of eggs. Plan the start of incubation, receive daily reminders to turn the eggs, document candling, and keep track of important dates until hatching. Ideal for hobby breeders and anyone who wants to successfully hatch chicks.

Screenshots

AquaCalculator4 screens
EggHatching4 screens

Verdict

The call

The clearest difference is price: AquaCalculator at Free against EggHatching's $3.99. AquaCalculator also leads on rating (3.7 vs 1.0) and update cadence (every 3 weeks vs every 4 months). EggHatching's advantage is in-app purchases (none vs 5). On ads and iOS requirement 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

AquaCalculator is free to download; EggHatching costs $3.99 up front. AquaCalculator sells 5 in-app purchases, starting at $3.99 per month. EggHatching asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AquaCalculator holds the better App Store score, 3.7 against 1.0. That said, the two scores are not equally well evidenced: AquaCalculator has 12 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

AquaCalculator ships an update every 3 weeks, EggHatching every 4 months. The most recent releases landed on October 20, 2026 and October 8, 2026 respectively.

Scorecard7 real differences · 3 level
AquaCalculator versus EggHatching: the parameters behind the verdict, then further details
ParameterAquaCalculatorEggHatching
PriceFree — better$3.99
Rating3.7 (12 ratings) — better1.0 (1 ratings)
Positive reviews66.7% of reviews—
Number of ratings12 — better1
Update frequencyEvery 3 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionPaid — better
DevicesiPhone, iPad, Mac, Vision Pro — betteriPhone, iPad
Requires iOS18.618.6
Further details — not scored
Size49 MB1 MB
Age rating4+4+
DeveloperThallosHenning Weitner

Customer experience

AquaCalculator

All ratings12 ratings
Positive58.3%
Neutral8.3%
Negative33.3%
Written reviews36 reviews
Positive66.7%
Neutral13.9%
Negative19.4%

EggHatching

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

5 purchases

AquaCalculator

Subscriptions2
  • AquaCalculator monthly3 Days trial$3.991 Month
  • AquaCalculator yearly14 Days trial$19.991 Year
One-time3
  • A large coffee$3.99
  • Ice Tead and a Sandwich$9.99
  • Something to learn$39.99
None

EggHatching

No in-app purchases

Questions

Is AquaCalculator free?
AquaCalculator is free to download, with in-app purchases available.
Is EggHatching free?
EggHatching costs $3.99, with no in-app purchases.
Which has better reviews, AquaCalculator or EggHatching?
AquaCalculator is rated higher. AquaCalculator averages 3.7 out of 5 from 12 ratings, while EggHatching averages 1.0 from 1 ratings.
Do AquaCalculator or EggHatching have ads?
Neither AquaCalculator nor EggHatching shows ads.
Which is updated more often, AquaCalculator or EggHatching?
AquaCalculator ships an update every 3 weeks, and EggHatching every 4 months. Most recently, AquaCalculator was updated on October 20, 2026 and EggHatching on October 8, 2026.

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