# モチスピ vs bayes_lab

The clearest difference is in-app purchases: bayes_lab at none against モチスピ's 11. bayes_lab also leads on ads (none vs shown) and update cadence (daily vs every 6 days). モチスピ's advantage is iOS requirement (15.0 vs 26.4). On price and device support there is nothing between them.

Both are free to download. モチスピ sells 11 in-app purchases, starting at $22.99 per month. bayes_lab asks for nothing beyond the download.

モチスピ ships an update every 6 days, bayes_lab daily. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | モチスピ | bayes_lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (21 ratings)](https://appshunter.io/ios/app/ai/id6761979905/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 56.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 369 MB | 3 MB |
| Requires iOS | **15.0** | 26.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Astran Inc.](https://appshunter.io/developer/1689875203) | [BeeKnowledgeDesign,Inc.](https://appshunter.io/developer/1659817106) |

## What reviewers say

### モチスピ

[App page](https://appshunter.io/ios/app/ai/id6761979905)

This app offers an engaging way to improve English speaking skills through unlimited AI conversations. It analyzes your speech, provides personalized feedback, and offers a vast library of scenarios and vocabulary to help you become fluent.

**Highlights:** Unlimited AI conversation practice, AI speech analysis and feedback, Personalized word and phrasebook, Extensive scenario coverage (2000+ scenes), Support for all skill levels, 英検® secondary interview practice, Visualized learning progress

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1ヶ月プラン | $22.99 | per month |
| 12ヶ月プラン（キャンペーン） | $129.99 | per year |
| 12ヶ月プラン | $179.99 | per year |
| ファミリープラン | $199.99 | per year |
| ファミリープラン（キャンペーン） | $199.99 | per year |
| モチベイト原石×1 | $0.99 | one-time |
| モチベイト原石×6 | $3.99 | one-time |
| モチベイト原石×12 | $5.99 | one-time |
| モチベイト原石×30 | $12.99 | one-time |
| モチベイト原石×60 | $24.99 | one-time |
| モチベイト原石×85 | $29.99 | one-time |


### bayes_lab

[App page](https://appshunter.io/ios/app/bayes-lab/id6777813012)

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

**In-app purchases:** none


## Frequently asked questions

### Is モチスピ free?

モチスピ is free to download, with in-app purchases available.

### Is bayes_lab free?

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

### Do モチスピ or bayes_lab have ads?

モチスピ shows ads; bayes_lab does not.

### Which is updated more often, モチスピ or bayes_lab?

モチスピ ships an update every 6 days, and bayes_lab daily. Most recently, モチスピ was updated on September 22, 2026 and bayes_lab on September 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.*