Dia Key may suit you if…
You use an iPhone, want a free journal-centered pause, value on-device or iCloud-based journal storage, and want a small routine rather than a broad productivity platform.
Home / Comparisons / Dia Key vs Opal
Updated comparison · July 26, 2026
Dia Key vs Opal
Dia Key and Opal are both iPhone tools for creating more intentional app use, but they approach the interruption differently. Dia Key connects a selected app boundary to a short gratitude entry. Opal offers a broader focus platform with rules, timers, and app blocking.
At a glance
| Consideration | Dia Key | Opal |
|---|---|---|
| Core approach | Scheduled app shielding paired with a gratitude entry. | Focus app with rules, schedules, time limits, and app blocking, according to Opal. |
| Apple integration | Uses Apple Screen Time permission for selected app shielding. | Opal says it asks iPhone/iPad users for Screen Time API permission. |
| Journaling | Built-in short gratitude journal. | Not presented as a gratitude-journaling product on the cited Opal product pages. |
| Privacy description | Entries stay on-device or optional personal iCloud; no Dia Key account is required for journaling. | Opal says its blocking technology operates locally and describes its data practices on its site. |
| Price | Free to download and use; check App Store for current availability. | Opal lists a free tier and Pro options; see its pricing page for current terms. |
| Cross-platform | iPhone-focused. | Opal lists iOS, Android, and Mac on its pricing page. |
How the two routines differ
Dia Key’s central behavior is reflective interruption. During an active schedule, a selected distracting app remains shielded until the user completes a brief gratitude entry. The product is deliberately narrow: it is for someone who wants a journaling prompt to be the pause before a habitual tap.
Opal describes a larger set of focus features including rules, schedules, time limits, open limits, timers, and app blocking. That may be a better fit for someone who wants several types of focus rules or a product that spans devices. It is not necessarily a better fit for someone looking for a simple private gratitude practice.
Privacy and permission questions to ask
For either tool, read the current privacy policy and permission screen before enabling app management. Ask what is stored locally, what is sent to a service, whether an account is needed, how data can be deleted, and how Apple Screen Time authorization is used. Dia Key’s specific storage practices are documented in its Privacy Policy. Opal explains its current practices in its own privacy FAQ.
Which should you choose?
Opal may suit you if…
You want focus rules, time limits, and a product that lists support for iOS, Android, and Mac. Review its current free-tier and Pro terms before deciding.
Frequently asked questions
Does either app bypass iPhone permissions?
No. Both describe use of Apple Screen Time technology that requires user permission. Apple controls the available platform capabilities.
Is either product medical treatment for addiction or ADHD?
No. App boundaries can support a personal routine but do not diagnose, treat, or cure a condition.
Are the prices guaranteed?
No. App pricing and plan details change. Check the current App Store and each company’s official pricing page before purchase.