Comparison

KoiControl vs Starcool

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

Head to head
About

KoiControl

Digitally manage your koi population and pond water quality. Track fish growth, calculate optimal feeding amounts, and monitor water parameters with automated analysis and suggestions. View trends with generated charts and manage multiple ponds.

Highlights
  • Water parameter tracking and analysis
  • Koi profile creation and growth history
  • Automated food calculator
  • Trend analysis with charts
  • Multiple pond management
  • Offline functionality
Features
Read full description

Put an end to paperwork! With KoiControl the annoying process of writing down water parameters and koi data on paper has finally come to an end. Additionally, KoiControl helps you to determine the right amount of food for your koi population. After downloading the app for free you will first use a trial version with limited functionality. This allows you to get a better impression of the app and, if you like it, you can unlock all features by purchasing the premium version for your account. This is a yearly subscription, which helps us to develop more features for you and enables you to store as many entries as you wish on our servers. Read more below to get an overview of KoiControl's benefits: Keep an eye on your water parameters! As a pond owner, it is important to regularly measure your water parameters to ensure the well-being of your fish. With KoiControl you always keep an eye on all parameters. The app analyzes your water parameters and gives you suggestions on how to improve them if necessary. Manage and track your koi! Create your koi as profiles in the app to always keep an overview of your koi population. You can save all important information about your fish, such as name, variety, age, size, weight and much more. The built-in growth history makes it easy to see how well your koi have grown. Ensure ideal growth! Healthy and strong growth is the desire of every koi keeper. Through our built-in food calculator you can calculate the ideal amount of food. Based on your koi population and the water temperature, the recommended food quantity for your growth ambitions is calculated automatically. You don't even need to know the weight of your fish, as KoiControl determines this very accurately based on the length of the fish. Recognize developments early! The growth of your fish and the water quality of your pond are very important for you as a koi owner. How nice would it be to see trends and developments in your water measurements and koi growth at an early stage? Thanks to our automatically generated charts you can easily see trends and the potential of your koi. It is also possible to create a PDF file so that you can share your success with others or create a seasonal report. Manage your ponds! The essential information of your pond can be stored in the app. This includes e.g. volume, circulation rate or the deepest point. Even multiple ponds are not a problem. You can clearly assign fish and water measurements to the respective pond. Enjoy the app on all your devices! You own more than one device on which you want to use the app? A KoiControl account enables you to manage your stored data on all your devices. Of course, you can also use the app without an account and then transfer your data at a later time. Can also be used offline! No WiFi at the pond? No problem, our app can of course also be used without an internet connection. Terms of use / EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Starcool

Features
Read full description

Starcool Air-Con (S) Pte Ltd specialises in air conditioning installation, maintenance and cleaning service in Singapore. The application has been designed to offer convenience for service bookings, tracking of job status, and payment. Features of the Starcool app: 1. Sign-up and login 2. View and edit profile 3. View services and reviews from other customers 4. Book one-time / recurring services based on slot availability 5. View Servicing history 6. View upcoming service schedule 7. Track status of service 8. Share feedback on service

Screenshots

KoiControl4 screens
Starcool4 screens

Verdict

The call

The clearest difference is in-app purchases: Starcool at none against KoiControl's 5. On price, update cadence, 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. KoiControl sells 5 in-app purchases, starting at $11.99 per year. Starcool asks for nothing beyond the download.

UpkeepUpdate frequency

KoiControl ships an update every 3 weeks, Starcool every 6 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

Scorecard1 real difference · 9 level
KoiControl versus Starcool: the parameters behind the verdict, then further details
ParameterKoiControlStarcool
PriceFreeFree
Rating4.7 (11 ratings) — better—
Positive reviews87.2% of reviews—
Number of ratings11 — better—
Update frequencyEvery 3 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.013.0
Further details — not scored
Size85 MB47 MB
Age rating4+17+
DeveloperMake IT Simple GmbHASURE GROUP PTE LTD

In-app purchases

5 purchases

KoiControl

Subscriptions5
  • KoiControl premium version$11.991 Year
  • Koi Dealer Bronze$14.991 Month
  • KoiControl premium version$17.991 Year
Show 2 more
  • Koi Dealer Silver$17.991 Month
  • Koi Dealer Gold$24.991 Month
None

Starcool

No in-app purchases

Questions

Is KoiControl free?
KoiControl is free to download, with in-app purchases available.
Is Starcool free?
Starcool is free to download, with no in-app purchases.
Do KoiControl or Starcool have ads?
Neither KoiControl nor Starcool shows ads.
Which is updated more often, KoiControl or Starcool?
KoiControl ships an update every 3 weeks, and Starcool every 6 weeks. Most recently, KoiControl was updated on October 24, 2026 and Starcool on October 27, 2026.

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