02
Common questions
Where are my records stored? Can I lose them?
Records are saved on the current device. With sync enabled, iPhone, iPad and Mac can sync through your own iCloud. Apple Watch exchanges records with its paired iPhone. The developer cannot read your iCloud records. Uninstalling the app removes only local data; choose Erase all records in the app to delete the iCloud copy. Web records stay in the current browser and are deleted when you clear its site data.
I got a new phone. Do my records move with me?
Sign in to the same Apple Account on your new iPhone, iPad or Mac and enable sync in Shijian to sync records through iCloud. Web records stay in the original browser and cannot be transferred through iCloud.
My records disappeared after switching browsers or addresses
Web records are stored separately for each site and browser. If you have not cleared the original browser's site data, return to the original address in that browser to look for your records.
My watch and phone disagree
Apple Watch and its paired iPhone sync active experiments, check-ins and notes for the day. Changes are kept locally while offline and sent when the connection returns. If records still differ, bring the devices together, unlock them and open Shijian on each, then check again.
Why don’t the app and the web version share records?
With sync enabled, iPhone, iPad and Mac use your iCloud. Web records stay in the current browser. The Apple apps and web version do not share records.
How many experiments can I run at once?
Up to 3. When starting a new one you can run it alongside the current experiments, or drop one of them to make room.
Where do finished or abandoned experiments go?
Find them under My experiments → Experiment archive, or choose Restore to resume.
How do I switch languages?
The interface and every experiment support 简体中文, 繁體中文, English, 日本語, and 한국어. Your preference is remembered. On this page, open Settings in the upper-right corner to change the language.
How do I delete my data for good?
Deleting Shijian from an iPhone, iPad, Mac, or Apple Watch removes only that device’s local data; the iCloud copy remains. To remove that too, choose Erase all records under My experiments → Support & privacy; for the web version, clear site data or storage in your browser. The privacy policy has the full description.
03
When an archive cannot be read
The app prepares a problem description and six diagnostic fields: app version, system version, product model, archive format version, failure category, and automatic processing result. Unavailable values stay unknown. Diagnostics exclude record contents, unique device identifiers, accounts, and full private paths. Review the materials before sending; you can also describe steps to reproduce the issue. We reply to the sender’s email address without requesting another contact method.
The original archive is optional and unchecked by default. Diagnostics alone are enough to ask for help. An archive may contain all your private records and can help diagnose the issue and verify a fix, but recovery is not guaranteed. Automatic private preservation copies have a 12 MiB limit. A complete support export you actively choose is not subject to that limit, and the product adds no attachment size limit; your mail service or system may still limit capacity. If the original is unavailable, the report explicitly says it is not included.
Opening a draft does not mean sent. A handoff to a mail app or a system queue confirmation does not mean support has received it. We treat it as received only when it actually appears in the support inbox. Cancellation or failure does not resend automatically or change the original; your selection and available materials remain when you return to the report. If mail is not configured or cannot open, save the selected materials and copy the email address on this page to send through webmail. Watch reports continue on the paired iPhone using only Watch materials actually received; phone materials do not stand in for Watch materials.
Received archive materials are retained while the issue remains unresolved. After a verified resolution, we retain them for 30 calendar days, then remove attachment emails, downloaded copies, and analysis files derived from the archive that support can control. Failed cleanup or remaining materials require further handling. We cannot recall your sent mail or control the mail provider’s backups. See the Privacy Policy.
Resetting the local archive on the protection screen clears only this device and does not request deletion from iCloud or other devices. This differs from Erase all records during normal use, whose deletions propagate when sync is enabled.