# AquaCalculator vs ShiftPilot Schichtplan

The clearest difference is in-app purchases: ShiftPilot Schichtplan at none against AquaCalculator's 5. AquaCalculator's advantage is device support (4 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

Both are free to download. AquaCalculator sells 5 in-app purchases, starting at $3.99 per month. ShiftPilot Schichtplan asks for nothing beyond the download.

AquaCalculator ships an update monthly, ShiftPilot Schichtplan every 3 weeks. The most recent releases landed on November 13, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | AquaCalculator | ShiftPilot Schichtplan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (12 ratings)](https://appshunter.io/ios/app/aquacalculator/id1449511522/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 67.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Subscription | — |
| Size | 53 MB | 3 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thallos](https://appshunter.io/developer/544488594) | [Faton Defqa](https://appshunter.io/developer/1893948869) |

## What reviewers say

### AquaCalculator

[App page](https://appshunter.io/ios/app/aquacalculator/id1449511522)

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:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AquaCalculator monthly | $3.99 | per month |
| AquaCalculator yearly | $19.99 | per year |
| A large coffee | $3.99 | one-time |
| Ice Tead and a Sandwich | $9.99 | one-time |
| Something to learn | $39.99 | one-time |


### ShiftPilot Schichtplan

[App page](https://appshunter.io/ios/app/shiftpilot-schichtplan/id6805600048)

**Features:** iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is AquaCalculator free?

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

### Is ShiftPilot Schichtplan free?

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

### Do AquaCalculator or ShiftPilot Schichtplan have ads?

Neither AquaCalculator nor ShiftPilot Schichtplan shows ads.

### Which is updated more often, AquaCalculator or ShiftPilot Schichtplan?

AquaCalculator ships an update monthly, and ShiftPilot Schichtplan every 3 weeks. Most recently, AquaCalculator was updated on November 13, 2026 and ShiftPilot Schichtplan on November 1, 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.*