# Smart Maximo Mobile vs AquaCalculator

The clearest difference is in-app purchases: Smart Maximo Mobile at none against AquaCalculator's 5. Smart Maximo Mobile also leads on iOS requirement (10 vs 18.6). AquaCalculator's advantage is device support (4 vs 2). On price, update cadence and ads there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Smart Maximo Mobile | AquaCalculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (12 ratings)](https://appshunter.io/ios/app/aquacalculator/id1449511522/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Subscription |
| Size | 118 MB | 49 MB |
| Requires iOS | **10** | 18.6 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Smartech](https://appshunter.io/developer/1316700203) | [Thallos](https://appshunter.io/developer/544488594) |

## What reviewers say

### Smart Maximo Mobile

[App page](https://appshunter.io/ios/app/smart-maximo-mobile/id1316700204)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Smart Maximo Mobile free?

Smart Maximo Mobile is free to download, with no in-app purchases.

### Is AquaCalculator free?

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

### Do Smart Maximo Mobile or AquaCalculator have ads?

Neither Smart Maximo Mobile nor AquaCalculator shows ads.

### Which is updated more often, Smart Maximo Mobile or AquaCalculator?

Smart Maximo Mobile ships an update every 3 weeks, and AquaCalculator every 3 weeks. Most recently, Smart Maximo Mobile was updated on October 14, 2026 and AquaCalculator on October 12, 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.*