Exon Map Explorer vs Krystal Bio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Exon Map Explorer
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The Exon Map Explorer is an Educational Tool for Understanding Exon Skipping in Duchenne Muscular Dystrophy (DMD).
Krystal Bio
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The Krystal Bio application provides trial participants with a single platform to view and complete all remote study activities including: - Signing study documents - Uploading medical records - Scheduling appointments - Meeting with telehealth providers - Completing questionnaires - Receiving study compensation …and more! Step 1: Download the Krystal Bio app Step 2: Log into your Krystal Bio account Step 3: Track and manage your study participation Note: this application is only for patients who are currently enrolled in a Krystal Bio study and directed to download this application.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Exon Map Explorer | Krystal Bio |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 8 MB | 17 MB |
| Age rating | 4+ | 12+ |
| Developer | SAREPTA THERAPEUTICS, INC. | Curebase, Inc. |
In-app purchases
Exon Map Explorer
No in-app purchases
Krystal Bio
No in-app purchases
