Excalibur v4 vs React Universe App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Excalibur v4
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Excalibur is an award winning enterprise grade authentication solution that enables immediate deployment of multi-factor authentication (MFA) using the phone as a hardware token plug and play converting all legacy password based systems (workstations, web apps …) to one time password (OTP) based, eliminating all attacks on passwords and improving user experience at the same time.
React Universe App
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Your event companion — powered by Callstack React Universe App helps you get the most out of every tech event. Whether you're attending a conference or meetup, this app makes it easy to connect, explore, and stay informed. No passwords or accounts — just sign up with your email and go.
Screenshots
Verdict
The clearest difference is update cadence: React Universe App at every 2 days against Excalibur v4's every 3 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.
Excalibur v4 ships an update every 3 weeks, React Universe App every 2 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.
| Parameter | Excalibur v4 | React Universe App |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 28 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | Excalibur s.r.o. | Callstack.io |
In-app purchases
Excalibur v4
No in-app purchases
React Universe App
No in-app purchases
Questions
Is Excalibur v4 free?
Is React Universe App free?
Do Excalibur v4 or React Universe App have ads?
Which is updated more often, Excalibur v4 or React Universe App?
Other comparisons
