# Double for Assistants vs Krystallize

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.

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.

## The numbers

| Metric | Double for Assistants | Krystallize |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/double-for-assistants/id1437668254/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/krystallize/id6449075628/reviews) |
| Number of ratings | 3 | **5** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 40 MB | 71 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Double Atelier, Inc](https://appshunter.io/developer/1437198407) | [Krystallize](https://appshunter.io/developer/1666570255) |

## What reviewers say

### Double for Assistants

[App page](https://appshunter.io/ios/app/double-for-assistants/id1437668254)

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.

**Highlights:** 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

**In-app purchases:** none


### Krystallize

[App page](https://appshunter.io/ios/app/krystallize/id6449075628)

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.

**Highlights:** Create unique digital spaces, Organize links, media, and documents, Seamless team collaboration, Event planning and client engagement, Share content with invited users

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Storage access up to 10 GB | $1.99 | per month |
| Storage access up to 50 GB | $4.99 | per month |
| Storage access up to 100 GB | $9.99 | per month |
| Storage access up to 10 GB | $19.99 | per year |
| Storage access up to 50 GB | $49.99 | per year |
| Storage access up to 100 GB | $99.99 | per year |


## Frequently asked questions

### Is Double for Assistants free?

Double for Assistants is free to download, with no in-app purchases.

### Is Krystallize free?

Krystallize is free to download, with in-app purchases available.

### Which has better reviews, Double for Assistants or Krystallize?

Double for Assistants and Krystallize are both rated 5.0 out of 5 on the App Store, from 3 and 5 ratings respectively.

### Do Double for Assistants or Krystallize have ads?

Neither Double for Assistants nor Krystallize shows ads.

### Which is updated more often, Double for Assistants or Krystallize?

Double for Assistants ships an update every 6 weeks, and Krystallize every 3 weeks. Most recently, Double for Assistants was updated on October 29, 2026 and Krystallize on October 24, 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.*