# CATALYST for Learning vs DogTells

The clearest difference is in-app purchases: CATALYST for Learning at none against DogTells's 6. CATALYST for Learning also leads on iOS requirement (10.0 vs 15.1). DogTells's advantage is update cadence (fortnightly vs every 48 months). On price, ads and device support there is nothing between them.

Both are free to download. DogTells sells 6 in-app purchases, starting at $9.99 per month. CATALYST for Learning asks for nothing beyond the download.

CATALYST for Learning ships an update every 48 months, DogTells fortnightly. The most recent releases landed on October 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CATALYST for Learning | DogTells |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Fortnightly** |
| Size | 4 MB | 76 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Internet Testing Systems (ITS)](https://appshunter.io/developer/546817214) | [Benjamin McGill](https://appshunter.io/developer/6809118580) |

## What reviewers say

### CATALYST for Learning

[App page](https://appshunter.io/ios/app/catalyst-for-learning/id1469065092)

**In-app purchases:** none


### DogTells

[App page](https://appshunter.io/ios/app/dogtells/id6809118578)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DogTells Standard Monthly | $9.99 | per month |
| DogTells Pro Monthly | $15.99 | per month |
| DogTells Standard Annual | $89.99 | per year |
| DogTells Pro Annual | $149.99 | per year |
| 10 Extra Analyses | $5.99 | one-time |
| 30 Extra Analyses | $12.99 | one-time |


## Frequently asked questions

### Is CATALYST for Learning free?

CATALYST for Learning is free to download, with no in-app purchases.

### Is DogTells free?

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

### Do CATALYST for Learning or DogTells have ads?

Neither CATALYST for Learning nor DogTells shows ads.

### Which is updated more often, CATALYST for Learning or DogTells?

CATALYST for Learning ships an update every 48 months, and DogTells fortnightly. Most recently, CATALYST for Learning was updated on October 7, 2026 and DogTells on October 31, 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.*