# Ripple Tank vs OJTLogbook

The clearest difference is price: OJTLogbook at Free against Ripple Tank's $5.99. OJTLogbook also leads on rating (5.0 vs 4.4) and update cadence (every 5 weeks vs every 7 months). Ripple Tank's advantage is ratings volume (7 vs 2) and iOS requirement (7.0 vs 13.0). On ads, in-app purchases and device support there is nothing between them.

OJTLogbook is free to download; Ripple Tank costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OJTLogbook holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 7 and 2 respectively.

Ripple Tank ships an update every 7 months, OJTLogbook every 5 weeks. The most recent releases landed on October 23, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Ripple Tank | OJTLogbook |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | [4.4 (7 ratings)](https://appshunter.io/ios/app/ripple-tank/id453338629/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ojtlogbook/id6711351113/reviews)** |
| Number of ratings | **7** | 2 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 weeks** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 33 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Falstad.com](https://appshunter.io/developer/453338632) | [Service Professionals Group](https://appshunter.io/developer/1767507173) |

## What reviewers say

### Ripple Tank

[App page](https://appshunter.io/ios/app/ripple-tank/id453338629)

Explore wave phenomena with a realistic ripple tank simulation. Create and save your own experiments to visualize concepts like interference, diffraction, and refraction. Ideal for students and educators seeking an interactive learning tool.

**Highlights:** Wave generation with finger touch, Demonstrates interference and diffraction, Visualizes refraction and resonance, Includes Doppler effect examples, Create and save custom experiments

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OJTLogbook

[App page](https://appshunter.io/ios/app/ojtlogbook/id6711351113)

This app facilitates hands-on work experience, bridging theoretical knowledge with practical application. It helps students and new employees develop essential skills, gain industry-specific knowledge, and understand workplace dynamics for professional growth.

**Highlights:** Hands-on work experience, Skill development, Industry-specific knowledge, Workplace dynamics understanding, Professional growth cultivation, Direct supervision and mentorship

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ripple Tank free?

Ripple Tank costs $5.99, with no in-app purchases.

### Is OJTLogbook free?

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

### Which has better reviews, Ripple Tank or OJTLogbook?

OJTLogbook is rated higher. Ripple Tank averages 4.4 out of 5 from 7 ratings, while OJTLogbook averages 5.0 from 2 ratings.

### Do Ripple Tank or OJTLogbook have ads?

Neither Ripple Tank nor OJTLogbook shows ads.

### Which is updated more often, Ripple Tank or OJTLogbook?

Ripple Tank ships an update every 7 months, and OJTLogbook every 5 weeks. Most recently, Ripple Tank was updated on October 23, 2026 and OJTLogbook on October 11, 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.*