CORE Open House vs Vortex Sphere
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CORE Open House
This app serves as a digital sign-in sheet for open houses, automatically capturing visitor information and syncing it with your kvCORE account. It enables automated lead nurturing campaigns to follow up with potential clients.
- Digital open house sign-in
- Automatic visitor data capture
- Syncs with kvCORE account
- Automated lead nurturing campaigns
- Mobile sign-in solution
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The kvCORE Open House app is your digital, open house sign-in sheet for any listing in your kvCORE account. When visitors sign in, their information is automatically sent to kvCORE, and you can set automated campaigns to further nurture your leads.
Vortex Sphere
Manage your important relationships with this contact system. It helps you prioritize daily outreach and provides tools to track and enhance your conversations. Spend more time on quality interactions with your network.
- Contact management system
- Daily priority contact list
- Call tracking
- Conversation enhancement
- Contact categorization
- Relationship nurturing
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Sphere is an all-inclusive contact management system that allows you to nurture your sphere of influence and stay top of mind with your most important relationships. Rather than wasting time wondering who to call next, Sphere creates a daily priority contact list with integrated tools to call, track, and enhance every conversation. Using Sphere is easy: simply upload your contact list, sort them into different categories, then nurture your daily priority contact list. With Sphere, you'll spend more time having quality conversations with your sphere of influence with all the tools you need to manage your contacts.
Screenshots
Verdict
The clearest difference is rating: Vortex Sphere at 4.0 against CORE Open House's 3.7. Vortex Sphere also leads on update cadence (fortnightly vs every 6 weeks). CORE Open House's advantage is ratings volume (58 vs 4). On price, review sentiment, ads and in-app purchases 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.
Vortex Sphere holds the better App Store score, 4.0 against 3.7. That said, the two scores are not equally well evidenced: CORE Open House has 58 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 48% of CORE Open House's written reviews are positive against 50% of Vortex Sphere's.
CORE Open House ships an update every 6 weeks, Vortex Sphere fortnightly. The most recent releases landed on September 29, 2026 and September 18, 2026 respectively.
| Parameter | CORE Open House | Vortex Sphere |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (58 ratings) | 4.0 (4 ratings) — better |
| Positive reviews | 48.1% of reviews | 50.0% of reviews — better |
| Number of ratings | 58 — better | 4 |
| Update frequency | Every 6 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 21 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | Kunversion, LLC | REDX |
Customer experience
CORE Open House
Vortex Sphere
In-app purchases
CORE Open House
No in-app purchases
Vortex Sphere
No in-app purchases
Questions
Is CORE Open House free?
Is Vortex Sphere free?
Which has better reviews, CORE Open House or Vortex Sphere?
Do CORE Open House or Vortex Sphere have ads?
Which is updated more often, CORE Open House or Vortex Sphere?
Other comparisons
