# Flex Metronome vs ReadBuddy.ai

The clearest difference is update cadence: ReadBuddy.ai at monthly against Flex Metronome's every 3 months. ReadBuddy.ai also leads on ratings volume (9 vs 1). Flex Metronome's advantage is iOS requirement (14.0 vs 17.0). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Flex Metronome sells 2 in-app purchases, starting at $0.99 per month and ReadBuddy.ai sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Flex Metronome against 5.0 for ReadBuddy.ai. That said, the two scores are not equally well evidenced: ReadBuddy.ai has 9 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Flex Metronome ships an update every 3 months, ReadBuddy.ai monthly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Flex Metronome | ReadBuddy.ai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/flex-metronome/id1438005944/reviews) | [5.0 (9 ratings)](https://appshunter.io/ios/app/readbuddyai/id6747660575/reviews) |
| Number of ratings | 1 | **9** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 5 MB | 78 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YASUHIRO SEKINE](https://appshunter.io/developer/1438005943) | [Wei Si](https://appshunter.io/developer/1822226477) |

## What reviewers say

### Flex Metronome

[App page](https://appshunter.io/ios/app/flex-metronome/id1438005944)

Create complex rhythm patterns like polyrhythms, swing, and ethnic grooves with this intuitive metronome app. Save your custom creations and utilize a library of editable presets for your musical needs.

**Highlights:** Create polyrhythms, Implement swing rhythms, Design ethnic grooves, Support odd time signatures, Save custom patterns, Edit preset rhythms

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $9.99 | per year |


### ReadBuddy.ai

[App page](https://appshunter.io/ios/app/readbuddyai/id6747660575)

This AI-powered companion helps children understand any book they read by asking age-appropriate questions. It fosters comprehension, confidence, and critical thinking, allowing parents to track progress. Works with any physical or digital book.

**Highlights:** AI-powered reading comprehension, Works with any book, Age-appropriate questions, Parental progress tracking, Builds confidence and curiosity, No personal data collected

**Features:** Family Sharing

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadBuddy Basic Monthly | $4.99 | per month |
| ReadBuddy Family Monthly | $8.99 | per month |
| ReadBuddy Basic Yearly | $49.99 | per year |
| ReadBuddy Family Yearly | $89.99 | per year |


## Frequently asked questions

### Is Flex Metronome free?

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

### Is ReadBuddy.ai free?

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

### Which has better reviews, Flex Metronome or ReadBuddy.ai?

Flex Metronome and ReadBuddy.ai are both rated 5.0 out of 5 on the App Store, from 1 and 9 ratings respectively.

### Do Flex Metronome or ReadBuddy.ai have ads?

Neither Flex Metronome nor ReadBuddy.ai shows ads.

### Which is updated more often, Flex Metronome or ReadBuddy.ai?

Flex Metronome ships an update every 3 months, and ReadBuddy.ai monthly. Most recently, Flex Metronome was updated on October 21, 2026 and ReadBuddy.ai 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.*