# Thermodynamics Calculators vs AI Language Practice

The clearest difference is review sentiment: AI Language Practice at 66% against Thermodynamics Calculators's 0%. AI Language Practice also leads on ratings volume (232 vs 2) and update cadence (every 2 days vs weekly). Thermodynamics Calculators's advantage is rating (5.0 vs 4.5) and monetization model (free vs free with in-app purchases). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Thermodynamics Calculators sells 3 one-off in-app purchases and AI Language Practice sells 42 in-app purchases, starting at $14.00 per month. Whichever you choose, the download price is not the number that matters.

Thermodynamics Calculators holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: AI Language Practice has 232 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 0% of Thermodynamics Calculators's written reviews are positive against 66% of AI Language Practice's, so the app with the better star average is not the one people write more warmly about.

Thermodynamics Calculators ships an update weekly, AI Language Practice every 2 days. The most recent releases landed on September 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Thermodynamics Calculators | AI Language Practice |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/thermodynamics-calculators/id1483394450/reviews)** | [4.5 (232 ratings)](https://appshunter.io/ios/app/ai-language-practice-bubblz/id6478813044/reviews) |
| Number of ratings | 2 | **232** |
| Positive reviews | 0.0% of reviews | **65.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 194 MB |
| Requires iOS | **16.6** | 17.5 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [Lucy Enterprises](https://appshunter.io/developer/1656612108) | [Surf City Apps LLC](https://appshunter.io/developer/576997553) |

## What reviewers say

### Thermodynamics Calculators

[App page](https://appshunter.io/ios/app/thermodynamics-calculators/id1483394450)

This app provides engineering professionals with a powerful tool for thermodynamics calculations. It features a comprehensive dataset for various species and a range of building blocks to construct complex models. An illustrative sample model is included for guidance.

**Highlights:** Temperature-dependent property data for 8 species, Building blocks for model creation, Daisy-chaining blocks for complex models, Includes one sample model, Validated against commercial software

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Edit option | $0.99 | one-time |
| Remove ads | $1.99 | one-time |
| Modeling access | $4.99 | one-time |


### AI Language Practice

[App page](https://appshunter.io/ios/app/ai-language-practice-bubblz/id6478813044)

Practice conversational fluency in multiple languages with AI-powered dialogues. Tailored to your proficiency level, it offers real-time feedback and native-like phrasing suggestions. Engage in dynamic, personalized conversations to accelerate your learning.

**Highlights:** AI-powered conversations, Adaptive learning levels, Instant feedback and corrections, Native expression suggestions, Customizable topics and scenarios, Speak or type interaction

**Features:** macOS Compatibility

**In-app purchases (42)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $14.00 | per month |
| Premium (Monthly) | $15.00 | per month |
| Premium (Monthly) | $15.00 | per month |
| Premium Plus Plan | $24.99 | per month |
| Ultra (Monthly) | $25.00 | per month |
| Premium Plus (Monthly) | $25.00 | per month |
| Ultra (Monthly) | $30.00 | per month |
| Ultra (Monthly) | $30.00 | per month |
| Ultra (Monthly) | $35.00 | per month |
| Premium (Annual) | $36.00 | per year |
| Premium (Annual) | $45.00 | per year |
| Ultra (Continuity) | $49.00 | per year |
| Premium (Annual) | $54.00 | per year |
| Premium (Annual) | $54.00 | per year |
| Premium Plan | $54.00 | per year |
| Premium Plan | $54.00 | per year |
| Ultra (6 Months) | $59.00 | per 6 months |
| Premium (Annual) | $59.00 | per year |
| Premium Plan | $59.00 | per year |
| Premium (Annual) | $64.00 | per year |
| Ultra (Continuity) | $69.00 | per year |
| Premium (Annual) | $69.00 | per year |
| Premium Plus (Annual) | $74.00 | per year |
| Ultra (Annual) Secret Discount | $79.00 | per year |
| Premium Plus (Annual) | $89.00 | per year |
| Ultra (Annual) | $94.00 | per year |
| Ultra Plan | $94.00 | per year |
| Ultra (Annual) | $99.00 | per year |
| Premium Plan | $99.00 | per year |
| Ultra (Annual) | $109.00 | per year |
| Ultra (Annual) | $109.00 | per year |
| Ultra (Annual) | $129.00 | per year |
| Ultra (Annual) | $139.00 | per year |
| Ultra Plan | $139.00 | per year |
| Ultra Plan | $149.00 | per year |
| Premium Plus Plan | $169.99 | per year |
| Ultra Plan | $179.00 | per year |
| Ultra (Annual) | $189.00 | per year |
| Ultra (Lifetime) | Free | one-time |
| Premium (Lifetime) | Free | one-time |
| Premium (Lifetime) | $149.00 | one-time |
| Ultra (Lifetime) | $299.00 | one-time |

**What reviewers like**

- 👍 Excellent for language practice
- 💡 AI-powered conversations feel natural
- 🚀 Improves language skills effectively
- 👍 Grammar tips and corrections are helpful
- 👍 Easy to use and interactive

**What reviewers complain about**

- 🐛 App doesn't work on iPad
- 🐛 Unable to connect after payment
- 🐛 App feels abandoned
- 🐛 Missing Chinese native language option
- 🐛 Missing Vietnamese language pack

**Reported bugs**

- Clicking 'Let's go' does nothing on iPad
- Cannot enter theme on iPad
- Impossible to connect after payment
- Error messages at all stages
- Password reset not working

**Requested features**

- Add Chinese native language
- Add Vietnamese language pack
- Add Arabic language
- Add English subtitles
- Add metrics and reminders


## Frequently asked questions

### Is Thermodynamics Calculators free?

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

### Is AI Language Practice free?

AI Language Practice is free to download, with in-app purchases available.

### Which has better reviews, Thermodynamics Calculators or AI Language Practice?

Thermodynamics Calculators is rated higher. Thermodynamics Calculators averages 5.0 out of 5 from 2 ratings, while AI Language Practice averages 4.5 from 232 ratings.

### Do Thermodynamics Calculators or AI Language Practice have ads?

Neither Thermodynamics Calculators nor AI Language Practice shows ads.

### Which is updated more often, Thermodynamics Calculators or AI Language Practice?

Thermodynamics Calculators ships an update weekly, and AI Language Practice every 2 days. Most recently, Thermodynamics Calculators was updated on September 29, 2026 and AI Language Practice on October 30, 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.*