# Blobby vs PrepFlex

The clearest difference is in-app purchases: PrepFlex at none against Blobby's 1. Blobby's advantage is update cadence (every 3 months vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Blobby sells 1 one-off in-app purchase. PrepFlex asks for nothing beyond the download.

Blobby ships an update every 3 months, PrepFlex every 10 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Blobby | PrepFlex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/prepflex-study-optimizer/id6754576477/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | — | Free |
| Size | 31 MB | 25 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Simon Rahm](https://appshunter.io/developer/1582208859) | [Rajat Aggarwal](https://appshunter.io/developer/1849009713) |

## What reviewers say

### Blobby

[App page](https://appshunter.io/ios/app/blobby-cute-habit-tracker/id6754221082)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Blobby PRO | $4.99 | one-time |


### PrepFlex

[App page](https://appshunter.io/ios/app/prepflex-study-optimizer/id6754576477)

This app creates personalized study plans from your available time and topics. It helps students organize last-minute study sessions into effective, time-balanced schedules tailored to their needs. The app focuses on efficiency with no sign-ins or distractions.

**Highlights:** Create personalized study plans, Tailored to available time, Add and weight study topics, Set confidence levels for topics, Local data storage for privacy, Distraction-free study environment

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

**In-app purchases:** none


## Frequently asked questions

### Is Blobby free?

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

### Is PrepFlex free?

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

### Do Blobby or PrepFlex have ads?

Neither Blobby nor PrepFlex shows ads.

### Which is updated more often, Blobby or PrepFlex?

Blobby ships an update every 3 months, and PrepFlex every 10 months. Most recently, Blobby was updated on October 24, 2026 and PrepFlex on October 30, 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.*