# DIAMOND ハーバード・ビジネス・レビュー vs Strainer

The clearest difference is update cadence: Strainer at fortnightly against DIAMOND ハーバード・ビジネス・レビュー's every 25 months. DIAMOND ハーバード・ビジネス・レビュー's advantage is iOS requirement (6.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. DIAMOND ハーバード・ビジネス・レビュー sells 4 in-app purchases, starting at $16.99 per month and Strainer sells 1 in-app purchase, starting at $17.49 per month. Whichever you choose, the download price is not the number that matters.

DIAMOND ハーバード・ビジネス・レビュー ships an update every 25 months, Strainer fortnightly. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | DIAMOND ハーバード・ビジネス・レビュー | Strainer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 36.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 25 months | **Fortnightly** |
| Monetization | — | Subscription |
| Size | 23 MB | 59 MB |
| Requires iOS | **6.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [DIAMOND, Inc.](https://appshunter.io/developer/368890276) | [Strainer, Inc.](https://appshunter.io/developer/1141403091) |

## What reviewers say

### DIAMOND ハーバード・ビジネス・レビュー

[App page](https://appshunter.io/ios/app/diamond/id977539542)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DIAMOND ハーバード・ビジネス・レビュー | $16.99 | per month |
| DIAMOND ハーバード・ビジネス・レビュー | $47.99 | per 3 months |
| DIAMOND ハーバード・ビジネス・レビュー | $89.99 | per 6 months |
| DIAMOND ハーバード・ビジネス・レビュー | $194.99 | per year |


### Strainer

[App page](https://appshunter.io/ios/app/strainer/id1241739992)

This app provides easy-to-understand articles on trending topics in the digital age, focusing on explanations of US company earnings. It's designed for business professionals and executives, offering access to a vast archive of featured articles with a paid subscription.

**Highlights:** Digital age topic focus, US company earnings explanations, Easy-to-understand articles, Access to 4,000+ featured articles, Subscription-based content

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Strainer 有料会員 | $17.49 | per month |


## Frequently asked questions

### Is DIAMOND ハーバード・ビジネス・レビュー free?

DIAMOND ハーバード・ビジネス・レビュー is free to download, with in-app purchases available.

### Is Strainer free?

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

### Do DIAMOND ハーバード・ビジネス・レビュー or Strainer have ads?

Neither DIAMOND ハーバード・ビジネス・レビュー nor Strainer shows ads.

### Which is updated more often, DIAMOND ハーバード・ビジネス・レビュー or Strainer?

DIAMOND ハーバード・ビジネス・レビュー ships an update every 25 months, and Strainer fortnightly. Most recently, DIAMOND ハーバード・ビジネス・レビュー was updated on October 7, 2026 and Strainer on October 16, 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.*