# 66 Days vs RocketBlocks

The clearest difference is in-app purchases: RocketBlocks at none against 66 Days's 2. RocketBlocks also leads on iOS requirement (15.1 vs 17.0). 66 Days's advantage is ratings volume (258 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. 66 Days sells 2 in-app purchases, starting at $15.99 per month. RocketBlocks asks for nothing beyond the download.

RocketBlocks holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 66 Days has 258 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | 66 Days | RocketBlocks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (258 ratings)](https://appshunter.io/ios/app/66-days-ai-interview-prep/id6752681422/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rocketblocks/id6762474378/reviews)** |
| Number of ratings | **258** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Monetization | Freemium | **Free** |
| Size | 110 MB | 26 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Uru Technologies, LLC](https://appshunter.io/developer/1840551197) | [RocketBlocks](https://appshunter.io/developer/1894291348) |

## What reviewers say

### 66 Days

[App page](https://appshunter.io/ios/app/66-days-ai-interview-prep/id6752681422)

Master banking and consulting interviews with daily AI-powered practice. Track your progress on a 66-day journey with personalized feedback on technical, behavioral, and case questions. Improve your resume and gain confidence for top firms.

**Highlights:** AI interview coach with personalized feedback, Daily drills for behavioral, technical, and case questions, 66-day progress heat map, Resume checker, Excel and valuation tools, Analytics dashboard

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 66 Days Prep Pro | $15.99 | per month |
| 66 Days Prep Pro | $49.99 | per year |


### RocketBlocks

[App page](https://appshunter.io/ios/app/rocketblocks/id6762474378)

Practice essential case interview math skills on the go with realistic drills. Track your speed and accuracy, compare performance to benchmarks, and master 11 different problem types. Built by former consultants to help you succeed.

**Highlights:** Unlimited realistic case math drills, Track speed and accuracy, Compare performance to benchmarks, 11 different math problem types, Optional daily practice reminders, Simple, intuitive UI

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

**In-app purchases:** none


## Frequently asked questions

### Is 66 Days free?

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

### Is RocketBlocks free?

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

### Which has better reviews, 66 Days or RocketBlocks?

RocketBlocks is rated higher. 66 Days averages 4.8 out of 5 from 258 ratings, while RocketBlocks averages 5.0 from 1 ratings.

### Do 66 Days or RocketBlocks have ads?

Neither 66 Days nor RocketBlocks shows ads.

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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.*