Double for Assistants vs Krystallize
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Double for Assistants
Manage tasks assigned by your executives directly from your mobile device. This app consolidates all your execs into one place, allowing you to view their task lists, chat about specific items, and listen to voice messages. You can also create new tasks on the go and attach notes.
- Stay on top of executive tasks
- View all execs in one app
- Chat about specific tasks
- Listen to exec voice messages
- Create tasks on the go
- Attach clipboard text as notes
Read full descriptionHide full description
The Double dashboard for assistants, now available on mobile. • Stay on top of tasks your executives send your way • All your execs in one app: tap the exec picture to view another one's tasks list • Chat with your exec on any specific task • Listen to your exec's voice messages • Create a task on the go – quickly attach text from clipboard as a note
Krystallize
Effortlessly create and organize digital spaces for events, team coordination, client engagement, and personal connections. Save, share, and collaborate on links, media, documents, and emails within a single application. Invite others to join your spaces for seamless teamwork.
- Create unique digital spaces
- Organize links, media, and documents
- Seamless team collaboration
- Event planning and client engagement
- Share content with invited users
Read full descriptionHide full description
Krystallize enables you to create unique digital spaces effortlessly. Krystallize makes it easier to plan an event, coordinate with a team, engage with clients, and stay connected to what and who matters most. With Krystallize save, organize and share links, media, documents, and email in one application. Invite others to your spaces for seamless collaboration and sharing. Krystallize your world, today! Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Double for Assistants at none against Krystallize's 6. Krystallize's advantage is update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (11.0 vs 15.0). On price, rating, review sentiment and ratings volume 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. Krystallize sells 6 in-app purchases, starting at $1.99 per month. Double for Assistants asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Double for Assistants against 5.0 for Krystallize. Both are backed by a comparable volume of ratings — 3 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Double for Assistants ships an update every 6 weeks, Krystallize every 3 weeks. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.
| Parameter | Double for Assistants | Krystallize |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (5 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 | 5 — better |
| Update frequency | Every 6 weeks | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 40 MB | 71 MB |
| Age rating | 4+ | 17+ |
| Developer | Double Atelier, Inc | Krystallize |
Customer experience
Double for Assistants
Krystallize
In-app purchases
Double for Assistants
No in-app purchases
Krystallize
- Storage access up to 10 GB$1.991 Month
- Storage access up to 50 GB$4.991 Month
- Storage access up to 100 GB$9.991 Month
Show 3 moreShow fewer
- Storage access up to 10 GB$19.991 Year
- Storage access up to 50 GB$49.991 Year
- Storage access up to 100 GB$99.991 Year
