# Abacus Trainer vs Hydro Coach

The clearest difference is price: Hydro Coach at Free against Abacus Trainer's $4.99. Hydro Coach also leads on rating (5.0 vs 4.3) and update cadence (every 5 days vs every 18 months). Abacus Trainer's advantage is in-app purchases (none vs 2) and ratings volume (12 vs 2). On ads and iOS requirement there is nothing between them.

Hydro Coach is free to download; Abacus Trainer costs $4.99 up front. Hydro Coach sells 2 in-app purchases, starting at $4.99 per month. Abacus Trainer asks for nothing beyond the download.

Hydro Coach holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Abacus Trainer has 12 ratings behind it against 2, so its average is the more settled of the two.

Abacus Trainer ships an update every 18 months, Hydro Coach every 5 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Abacus Trainer | Hydro Coach |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.3 (12 ratings)](https://appshunter.io/ios/app/abacus-trainer/id828273038/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hydro-coach-hydroponics/id6756528916/reviews)** |
| Number of ratings | **12** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 5 days** |
| Monetization | Paid | **Freemium** |
| Size | 8 MB | 145 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hamster Force Multimedia Ltd.](https://appshunter.io/developer/443416476) | [Kisha Baker](https://appshunter.io/developer/1861143296) |

## What reviewers say

### Abacus Trainer

[App page](https://appshunter.io/ios/app/abacus-trainer/id828273038)

This app generates customized abacus math exercises for addition and subtraction. It offers practice and challenge modes to improve accuracy and speed, with detailed reports to track progress. Users can also export quizzes for offline practice.

**Highlights:** Customizable addition and subtraction exercises, Practice and challenge modes, Performance tracking and reports, Offline exercise export (PDF), Randomized question generation, Print and email quiz options

**Features:** Vision Pro support

**In-app purchases:** none


### Hydro Coach

[App page](https://appshunter.io/ios/app/hydro-coach-hydroponics/id6756528916)

This app helps indoor growers manage their hydroponic systems with tools for tracking plant health, monitoring pH and EC levels, and calculating nutrient mixes. It offers light scheduling, smart reminders, and a grower's guide to various systems and terminology.

**Highlights:** Track active and harvested grows, Monitor plant health and stress indicators, pH and EC level monitoring, Nutrient mixing calculations, Light scheduling and reminders, Smart reminders for system maintenance, Hydroponic system guide and glossary

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hydro Coach Plus | $4.99 | per month |
| Hydro Coach Plus | $39.99 | per year |


## Frequently asked questions

### Is Abacus Trainer free?

Abacus Trainer costs $4.99, with no in-app purchases.

### Is Hydro Coach free?

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

### Which has better reviews, Abacus Trainer or Hydro Coach?

Hydro Coach is rated higher. Abacus Trainer averages 4.3 out of 5 from 12 ratings, while Hydro Coach averages 5.0 from 2 ratings.

### Do Abacus Trainer or Hydro Coach have ads?

Neither Abacus Trainer nor Hydro Coach shows ads.

### Which is updated more often, Abacus Trainer or Hydro Coach?

Abacus Trainer ships an update every 18 months, and Hydro Coach every 5 days. Most recently, Abacus Trainer was updated on October 23, 2026 and Hydro Coach on October 24, 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.*