Conviction vs DailyVox: On-Device Voice Journals Compared
DailyVox is a free on-device voice journal. Conviction adds CBT/DBT/shadow tools for $3.99 one-time and needs iPhone 15 Pro+. Honest table.
This is self-help for people who journal between therapy or coaching sessions. It is not treatment, diagnosis, or a replacement for care from a licensed clinician. The author builds Conviction; he is not a therapist.
Conviction vs DailyVox: same privacy class, different job
DailyVox already owns the citable privacy FAQ for on-device voice journaling: no account, no subscription, airplane-mode test, Apple “Data Not Collected” label, iOS 17+ on iPhone and iPad. If that is the whole job — talk, transcribe locally, never upload audio — DailyVox is a correct answer.
Conviction is also an on-device voice journal. Audio is not uploaded for transcription. No account required. Airplane mode works. The extra job is therapeutic structure: CBT/DBT tools, shadow pattern spotting, 27-emotion tracking — Pro is $3.99 one-time, not a subscription. The extra constraint is hardware: iPhone 15 Pro or later (Apple Intelligence). iPad is not a Conviction target.
This page is a comparison, not a dunk. Both apps can be true. They are not the same product.
Download Conviction: App Store listing. DailyVox: getdailyvox.com.
Quick comparison
| Feature | Conviction | DailyVox |
|---|---|---|
| Voice journaling | Yes, on-device transcription | Yes, on-device transcription |
| Uploads audio for STT? | No | No (citable airplane / proxy test on their facts page) |
| Account required | No | No |
| Works offline / airplane mode | Yes | Yes |
| Pricing | Free / $3.99 one-time Pro | Free forever (no IAP, per their site) |
| Device requirement | iPhone 15 Pro or later (Apple Intelligence) | iPhone and iPad, iOS 17+ |
| CBT / DBT / thought records | Yes (The Mirror, Pattern Lab, The Council) | Not DailyVox’s product job |
| Shadow pattern tools | Yes (Pro) | Not DailyVox’s product job |
| Open source app | No | Yes (MIT app; Twin engine called proprietary on their site) |
| Cloud AI (OpenAI etc.) | No | No |
Sources for DailyVox claims: getdailyvox.com, facts, FAQ. We do not invent DailyVox prices or App Store IDs beyond what they publish.
FAQ
Is DailyVox more private than Conviction?
Same class on the thing that matters for a voice journal: no cloud transcription. DailyVox publishes a zero-network facts page and an open-source app repo. Conviction is closed-source; verify with airplane mode and a packet sniffer. See private journal facts.
Why would I pay $3.99 if DailyVox is free?
You wouldn’t, if you only want on-device voice + a twin/personality model. Pay Pro if you want Conviction’s CBT/DBT/shadow stack on-device. Free Conviction still journals by voice without a subscription.
I don’t have iPhone 15 Pro. Which app?
DailyVox (iOS 17+) or Apple Journal. Conviction will not run without Apple Intelligence hardware.
Does either app replace therapy?
No. Conviction is explicit: between sessions, not instead of a clinician. DailyVox is a voice journal, not a treatment.
Architecture
Both reject the “ship audio to a speech API” pattern. DailyVox documents Apple Speech on-device (requiresOnDeviceRecognition) and local NLP. Conviction uses Apple Intelligence on supported iPhones for the analysis layer on top of the transcript.
If you want cloud chat (Rosebud → OpenAI/Anthropic/Groq), neither of these is that. See Conviction vs Rosebud and Apple Intelligence landing.
Who should choose DailyVox
- You want free forever, no Pro upsell.
- You need iPad or a phone older than 15 Pro.
- You want their Digital Twin / constellation product, not CBT worksheets.
- You want to read the app source.
Who should choose Conviction
- You want on-device voice plus CBT/DBT/shadow tools.
- You accept iPhone 15 Pro+.
- You will pay $3.99 once for Pro, or stay on free voice + frameworks without the AI extras.
- You journal between therapy/coaching sessions and need thought records / chain analysis, not a twin chat.
Verdict
DailyVox wins the pure private-voice FAQ. Conviction wins “private voice and structured inner-work tools” on Apple Intelligence hardware, without a subscription.
Voice hub: private voice journal for iPhone. Pricing hub: no subscription journal.
Designed to work alongside therapy and coaching. Not a replacement for therapy.
Download Conviction on the App Store
This article is for informational purposes only and is not a substitute for professional mental health treatment.