# Exon Map Explorer vs Krystal Bio

The clearest difference is update cadence: Krystal Bio at every 9 days against Exon Map Explorer's every 5 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Exon Map Explorer ships an update every 5 weeks, Krystal Bio every 9 days. The most recent releases landed on May 17, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Exon Map Explorer | Krystal Bio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Size | 8 MB | 17 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [SAREPTA THERAPEUTICS, INC.](https://appshunter.io/developer/1604723220) | [Curebase, Inc.](https://appshunter.io/developer/1437100129) |

## What reviewers say

### Exon Map Explorer

[App page](https://appshunter.io/ios/app/exon-map-explorer/id1604723218)

**Features:** macOS Compatibility

**In-app purchases:** none


### Krystal Bio

[App page](https://appshunter.io/ios/app/krystal-bio/id6503323932)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Exon Map Explorer free?

Exon Map Explorer is free to download, with no in-app purchases.

### Is Krystal Bio free?

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

### Do Exon Map Explorer or Krystal Bio have ads?

Neither Exon Map Explorer nor Krystal Bio shows ads.

### Which is updated more often, Exon Map Explorer or Krystal Bio?

Exon Map Explorer ships an update every 5 weeks, and Krystal Bio every 9 days. Most recently, Exon Map Explorer was updated on May 17, 2026 and Krystal Bio on September 13, 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.*