DayHack Privacy Policy
This policy explains what personal information the DayHack app ("the app") handles, why, where, for how long, and how you can control it. It describes how the app actually works today. If this English text and a translation differ, the English text applies, except where the law of your country requires otherwise.
1. Who we are
- Operator and controller: JoCoding, Inc. (a Delaware corporation, United States)
- Address: 1111B S Governors Ave, STE 80543, Dover, DE 19904, United States
- Privacy contact and person responsible for privacy requests: mu07010@jocoding.net
- Phone: +1 (231) 450-5622
- We have not appointed a separate Data Protection Officer, an EU/UK representative or a Korean domestic representative. If the law requires us to appoint one, we will appoint one and add the details here.
2. The basics
DayHack records speech during your waking day on your Apple Watch, and your iPhone turns it into text, a map and notes. You can also start and stop a recording on your iPhone yourself.
- Recordings, the text made from them, your locations, health context and your voice features stay only on your iPhone and Apple Watch by default.
- We do not require an account. We do not ask for your name, email address or phone number.
- Only the audio of conversations you choose to save as notes goes to our server, and that audio is deleted as soon as the text is ready.
- We do not sell personal information. We do not track you across other companies' apps and websites, we do not collect the advertising identifier (IDFA), and the app does not ask for tracking permission.
- People around you may also be recorded. The app tells you this before recording. You are responsible for following the recording-consent laws that apply where you are (see our Terms of Use).
3. What we process, why, and for how long
| Information | Where it is kept | Why | How long |
|---|---|---|---|
| Audio recordings (watch all-day recording, iPhone recording) | Your device | Turning speech into text, playback, cutting a note | The audio retention you choose (7, 30 or 90 days or keep; default 30 days) |
| Text, conversations and computed values (talking time, pace, pauses, habit words) | Your device | Day view, search, patterns | Until you delete them |
| Location history (time and coordinates when you open the app, while recording, and, with "Always" permission, when you stay somewhere or move a long way) | Your device | Placing conversations, map | Until you delete it |
| Places (grouped coordinates, place names, place type) | Your device | Map, day view, place patterns, situation suggestions | Until you delete them |
| One center coordinate per place and the app language | Apple Maps (Apple Inc.) | Getting a place name | Apple's policy. Places you name yourself are not looked up |
| Voice features, if you set up "My voice" (section 4) | Your device only | Telling your words from other people's | Until you delete them, the app is removed, or 365 days after last use |
| Heart rate, sleep and steps read from Apple Health (read only) | Your device | Context for conversations | Only computed values are kept, on your device |
| Calendar event times, titles and number of attendees for events that overlap a conversation | Your device | Note and situation suggestions | Kept with that conversation on your device |
| Audio of conversations you save as notes | Our server, then our transcription provider | Large-model transcription and speaker separation | Deleted from our server as soon as the text is ready. If the upload is not finished, the job is cleared after 60 minutes |
| Note results (title, summary, key points, follow-ups, speaker-separated text) | Our server | So the app can collect them | Deleted when the app collects them, at the latest after 72 hours |
| Questions and the sentences sent with them, sentences for the daily look back and titles | Our server, then our summary provider | Answers, summaries, titles | Not stored. An answer is kept 24 hours only so a retried request is not charged twice |
| Place names, heart rate, sleep and steps sent with a question | Our server, then our summary provider | Better answers | Only if you turn this on in Settings (off by default). Not stored |
| Anonymous user ID, install ID, device public key, last-used time (to the hour) | Our server | Linking your subscription and minutes without an account, verifying requests | Until you ask us to delete server records |
| Minutes (credits) ledger | Our server | Providing subscription benefits | Until you ask us to delete server records |
| Purchase records | Apple, RevenueCat | Subscription status, renewals, cancellations | Their policies |
| Usage events (event names, categories and numbers), a random ID per install, device and OS type, approximate location derived from IP address | PostHog | Improving the app | Up to 1 year (our PostHog project retention setting) |
| Install and open, trial start and subscription start (no amounts), device and app details added by the SDK, a random SDK ID | Meta Platforms (Facebook SDK) | Measuring whether installs and subscriptions came from our ads | Meta's policy |
| Text of your notes, only if you turn on "Help improve quality" (section 6) | Our server | Improving transcription, speaker separation and summaries | 12 months, deleted right away when you turn it off |
| Details in support emails | Answering you | 3 years |
Usage statistics never include conversation text, audio, locations, place names, question content or health values.
Payment and subscription records that the law requires us to keep are kept for the period that the law of the relevant country sets (for example, 5 years under the Korean E-Commerce Act). Support emails are kept for 3 years.
4. Voice features (biometric information)
"My voice" is optional. Because voice features may count as biometric information in some places, we ask for separate, explicit consent on a dedicated screen before you set it up.
- What we create: from recordings of you reading 5 short sentences, the app computes numbers that describe your pitch and voice quality. The recordings are deleted as soon as the numbers are made. The app then uses the numbers to decide, sentence by sentence, whether a sentence was spoken by you.
- Where it stays: only on your iPhone, in a protected file that is excluded from iCloud backup. It is never sent to our server, usage statistics, optional contributions or anyone else, and we never sell, lease or trade it. We cannot see it.
- Consent record: the app stores the version of the consent text and the time you agreed, on your device only.
- Retention and destruction: the voice features and all judgments are permanently deleted (1) when you tap "Delete my voice" in Settings → My voice, (2) when you delete the app, or (3) automatically 365 days after they were last used. "Used" means you set them up or new recordings were checked with them. They are also deleted with "Erase all data".
- Withdrawing consent: deleting "My voice" withdraws your consent. The rest of the app works without it.
5. Location and Apple Maps
- Location is used only with your permission ("While Using", and later optionally "Always"). There is no continuous tracking. Locations are kept on your device.
- To name a place, the app sends one center coordinate for that place to Apple Maps (reverse geocoding and nearby search) and receives a shop, building or neighborhood name. This goes directly from your device to Apple, never to our server. Apple processes it under its own privacy policy.
6. Optional contribution ("Help improve quality")
- Off by default in every region. It works only if you turn it on and agree on the consent screen. There is no reward for turning it on.
- When on, for notes created after you turned it on, we keep only the text: speaker-separated sentences (speakers numbered like "S1"), relative times within the note, the summary results, language, length, number of speakers, model names and the date saved.
- We do not keep audio, speaker names you add, places, locations, health values, IP addresses or device information.
- The kept text is linked to you only through an irreversible value made with a secret key, so we can find and delete it.
- We automatically mask web addresses, email addresses, phone numbers and long digit strings before storing. Names, addresses and other identifying details spoken in a conversation cannot all be removed automatically. Notes may include what other people said and may include talk about health.
- Purpose: checking and improving the quality of transcription, speaker separation and summaries. It is not used for ads and not given to other companies.
- Access: only designated staff of JoCoding, Inc. can read the kept text, and each access is logged. It is used only to evaluate and improve the quality of transcription and summaries. We do not sell it to third parties, do not use it for advertising, and do not hand it over to train outside models.
- Kept for 12 months, then deleted automatically. Turning it off deletes everything kept so far right away.
7. Usage statistics and ad measurement by region
- EU, EEA, UK and Switzerland: usage statistics (PostHog) and install measurement (Meta) start only after you agree. Until then nothing is sent and the Meta SDK is not started.
- Everywhere else: anonymous usage statistics and install measurement are on by default, and you can turn them off at any time in Settings → Privacy → "Share anonymous usage stats".
- Region is determined from your device's region setting. If it cannot be determined, we ask first.
- While statistics are on, the random PostHog ID is linked to your RevenueCat customer so we can see how purchases and cancellations relate to app use. Turning statistics off removes the link.
- The app does not request App Tracking Transparency permission. Without it, iOS blocks Meta's tracking domain, and Meta states that it restricts such data and measures ads with privacy-preserving methods such as Aggregated Event Measurement.
- The app does not show targeted ads. Neither the app nor this website uses cookies.
8. Who we share information with (processors)
| Recipient | What they do | Location |
|---|---|---|
| Cloudflare, Inc. | Our server, database and file storage | United States and Cloudflare's global network |
| OpenAI (OpenAI, L.L.C.) | Note transcription and speaker separation, answers and summaries. API data is not used to train their models. Request logs for abuse monitoring may be kept up to 30 days; transcription requests are not kept | United States |
| RevenueCat, Inc. | Subscription management | United States |
| PostHog, Inc. | Usage statistics (US data region) | United States |
| Meta Platforms, Inc. and Meta Platforms Ireland Limited | Measuring installs and subscriptions from our ads | United States, Ireland |
| Apple Inc. | App Store payments, on-device speech recognition models, place names (Apple Maps) | United States and elsewhere |
These recipients process information on our behalf or under their own terms as described above. We do not provide personal information to any other third party unless the law requires it.
International transfers: we are located in the United States and the recipients above may process information outside your country, mainly in the United States. Transfers rely on the data-processing terms these providers offer, including standard contractual clauses where they apply. For the EEA, UK and Switzerland this means standard contractual clauses (SCCs), the UK International Data Transfer Agreement or Addendum (IDTA), or another transfer mechanism each provider uses. The transfer is needed to provide the service; if you refuse it, the related features (notes, questions, usage statistics) cannot be used.
9. Deletion and how we destroy information
- On your iPhone: delete conversations and notes one by one, or everything at once in Settings → Data → "Erase all data". Deleting the app also deletes everything stored by the app on the device.
- On our server: Settings → Data → "Delete server records" deletes your minutes, note jobs, install information and optional contributions. To stop the free minutes being claimed again by deleting and re-joining, we keep one line with an irreversible hash of your anonymous ID and the end time of that subscription period until that period ends. The app shows you that date.
- Copies left in backups are destroyed within 30 days after you ask us to delete your server records.
- When a retention period ends, files are deleted and database records are removed by scheduled jobs that run every minute. Deleted electronic records are not kept in a recoverable form by us.
- Deleting server records does not cancel your subscription. Cancel in the App Store. Purchase records remain with Apple and RevenueCat.
10. Your rights
Depending on where you live, you can ask to access, correct, delete, restrict or object to the processing of your information, to receive it in a portable form, and to withdraw consent at any time (this does not affect processing before withdrawal). You will not be treated differently for using these rights.
- Most controls are in the app: the retention setting, deleting conversations and notes, "Erase all data", "Delete server records", "Share anonymous usage stats", "Help improve quality" and "My voice". You can export your remaining audio yourself in Settings.
- For anything else, email mu07010@jocoding.net. Because there is no account, please write from the app's Settings → Contact us so your purchase customer ID is included and we can find your records. We answer within the time the law requires (generally one month).
- EEA and UK residents may complain to their local data protection authority. California residents: we do not sell personal information, and we do not use sensitive personal information to infer characteristics about you. We share limited install and subscription-start events with Meta to measure ads, and you can stop this at any time by turning off "Share anonymous usage stats" in Settings.
11. Legal bases (EEA, UK and Switzerland)
- Performance of our contract with you: credits, notes, questions, subscription handling.
- Consent: usage statistics, install measurement, optional contribution, "My voice", and sending context with questions.
- Legitimate interests: preventing abuse (the hash kept after deletion), security and keeping the service running.
12. Security
We use encrypted connections (HTTPS) for everything sent off your device. Requests to our server are signed with a key kept on your device. On-device files use iOS data protection, and voice features are stored with the strictest protection that keeps them unreadable while the device is locked. Server logs contain event names and numbers only, never conversation text, questions, locations, audio or user IDs. Access to server systems is limited to staff who need it.
13. Automated processing
Transcripts, summaries, suggestions and answers are produced automatically by software and AI models. They are not used to make decisions with legal or similarly significant effects on you. They can be wrong, and you can edit or delete them.
14. Children
The app is for people aged 16 and over, in every region. We do not knowingly collect information from anyone under 16, and if we learn that someone under 16 has used the app, we delete their records. If you believe a child has used the app, contact us.
15. Changes
We will announce changes to this policy in the app and on this page before they take effect. Effective date: 2026-11-14.