# 般若心経をおぼえよう vs Clean Days

The clearest difference is review sentiment: Clean Days at 67% against 般若心経をおぼえよう's 0%. 般若心経をおぼえよう's advantage is price (Free vs $1.99) and ads (none vs shown). On in-app purchases and device support there is nothing between them.

般若心経をおぼえよう is free to download; Clean Days costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

般若心経をおぼえよう ships an update monthly, Clean Days every 4 months. The most recent releases landed on September 15, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | 般若心経をおぼえよう | Clean Days |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/pop/id1010443766/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 21 MB | 35 MB |
| Requires iOS | **11.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Kensuke Tsuzuki](https://appshunter.io/developer/805504880) | [翠芬 梁](https://appshunter.io/developer/1792659056) |

## What reviewers say

### 般若心経をおぼえよう

[App page](https://appshunter.io/ios/app/pop/id1010443766)

Learn the Heart Sutra through a colorful, intuitive quiz format. This app offers a relaxing BGM experience and allows users to compete with friends via score sharing on social media. It's designed for both new and returning practitioners.

**Highlights:** Four-choice quiz format, Colorful and intuitive interface, Ambient BGM for relaxation, Score competition with friends, Twitter and Facebook score posting, Reduced file size for easy download

**Features:** macOS Compatibility

**In-app purchases:** none


### Clean Days

[App page](https://appshunter.io/ios/app/clean-days/id6746352521)

This app helps users build self-discipline and track personal growth through daily check-ins. Monitor your progress with detailed statistics, earn achievements, and maintain your streak with a user-friendly interface. It's designed to celebrate every step of your journey towards positive change.

**Highlights:** Daily check-ins to track streaks, Detailed statistics and growth trends, Achievement titles for progress, Backfill feature to maintain streaks, Multi-language support, User-friendly interface

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

**In-app purchases:** none


## Frequently asked questions

### Is 般若心経をおぼえよう free?

般若心経をおぼえよう is free to download, with no in-app purchases.

### Is Clean Days free?

Clean Days costs $1.99, with no in-app purchases.

### Do 般若心経をおぼえよう or Clean Days have ads?

Clean Days shows ads; 般若心経をおぼえよう does not.

### Which is updated more often, 般若心経をおぼえよう or Clean Days?

般若心経をおぼえよう ships an update monthly, and Clean Days every 4 months. Most recently, 般若心経をおぼえよう was updated on September 15, 2026 and Clean Days on September 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.*