# FireBelly vs BASLN

The clearest difference is ads: BASLN at none against FireBelly's shown. BASLN also leads on update cadence (weekly vs every 6 weeks). FireBelly's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. FireBelly sells 1 one-off in-app purchase and BASLN sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

FireBelly ships an update every 6 weeks, BASLN weekly. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | FireBelly | BASLN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/basln/id6762063362/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 64 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MyQuietSpot Inc.](https://appshunter.io/developer/1841316087) | [John Zic](https://appshunter.io/developer/1892713791) |

## What reviewers say

### FireBelly

[App page](https://appshunter.io/ios/app/firebelly-gerd-reflux-tracker/id6760884365)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FireBelly Pro | $14.99 | one-time |


### BASLN

[App page](https://appshunter.io/ios/app/basln/id6762063362)

Measure your cognitive performance with research-validated tests. Establish a personal baseline and track readiness zones. Correlate custom variables with your scores and receive evidence-ranked recovery protocols.

**Highlights:** 6 research-validated cognitive tests, Personalized baseline establishment, Readiness zones (Locked In, Good to Go, Off Day, Impaired), Custom variable correlation, Evidence-ranked recovery protocols, Trend analytics across cognitive domains, Data portability via CSV export

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basln | $4.99 | per month |
| Basln | $29.99 | per year |


## Frequently asked questions

### Is FireBelly free?

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

### Is BASLN free?

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

### Do FireBelly or BASLN have ads?

FireBelly shows ads; BASLN does not.

### Which is updated more often, FireBelly or BASLN?

FireBelly ships an update every 6 weeks, and BASLN weekly. Most recently, FireBelly was updated on October 18, 2026 and BASLN on October 11, 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.*