# Metric Practice Free vs Cerego

The clearest difference is rating: Cerego at 4.8 against Metric Practice Free's 2.3. Cerego also leads on review sentiment (69% vs 33%) and in-app purchases (none vs 1). Metric Practice Free's advantage is iOS requirement (6.0 vs 12.2). On price, ads and device support there is nothing between them.

Both are free to download. Metric Practice Free sells 1 one-off in-app purchase. Cerego asks for nothing beyond the download.

Cerego holds the better App Store score, 4.8 against 2.3. That said, the two scores are not equally well evidenced: Cerego has 2.1K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 33% of Metric Practice Free's written reviews are positive against 69% of Cerego's.

Metric Practice Free ships an update every 7 months, Cerego every 8 days. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Metric Practice Free | Cerego |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/metric-practice-free/id609021842/reviews) | **[4.8 (2.1K ratings)](https://appshunter.io/ios/app/cerego/id688575194/reviews)** |
| Number of ratings | 3 | **2.1K** |
| Positive reviews | 33.3% of reviews | **68.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 8 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 12 MB | 74 MB |
| Requires iOS | **6.0** | 12.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carolina Biological Supply](https://appshunter.io/developer/413708533) | [Cerego, Inc](https://appshunter.io/developer/602976858) |

## What reviewers say

### Metric Practice Free

[App page](https://appshunter.io/ios/app/metric-practice-free/id609021842)

Practice converting between metric prefixes and S.I. units. This app allows you to select units, values, or both to find equivalents. The free version includes novice-level practice for each conversion type.

**Highlights:** Metric prefix conversion practice, S.I. unit conversions, Selectable units and values, Different skill levels, Novice level practice included

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Metric Practice Premium Content | $1.99 | one-time |


### Cerego

[App page](https://appshunter.io/ios/app/cerego/id688575194)

This app offers a personalized learning experience, syncing course content and tracking your progress. It utilizes microlearning principles and smart notifications to help you study efficiently and retain information effectively. Access your learning materials anytime, anywhere, even offline.

**Highlights:** Personalized study recommendations, Smart review notifications, Progress tracking and analytics, Offline study mode, Automatic cross-device sync, Microlearning approach

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Great study tool
- 👍 Innovative and intuitive UI
- 🚀 Convenient for on-the-go learning
- 👍 Helpful for memorization and retention
- 👍 Effective learning platform

**What reviewers complain about**

- 🐛 Crashes and bugs
- ⏱️ Overly long mandatory breaks
- 🕰️ Slow progress and completion time
- 🤖 Issues with text-to-speech functionality
- 📚 Limited access to content and courses

**Reported bugs**

- Frequent app crashes
- Inconsistent reset and review times
- Blank or unreadable flashcards
- Compatibility issues with newer iOS versions
- Syncing problems between app and website

**Requested features**

- Ability to complete assignments without mandatory breaks
- Improved syncing between mobile app and website
- More customization options for study sessions
- Expanded course and content library
- Better support for different learning styles


## Frequently asked questions

### Is Metric Practice Free free?

Metric Practice Free is free to download, with in-app purchases available.

### Is Cerego free?

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

### Which has better reviews, Metric Practice Free or Cerego?

Cerego is rated higher. Metric Practice Free averages 2.3 out of 5 from 3 ratings, while Cerego averages 4.8 from 2.1K ratings.

### Do Metric Practice Free or Cerego have ads?

Neither Metric Practice Free nor Cerego shows ads.

### Which is updated more often, Metric Practice Free or Cerego?

Metric Practice Free ships an update every 7 months, and Cerego every 8 days. Most recently, Metric Practice Free was updated on November 1, 2026 and Cerego on November 6, 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.*