A closer look
at your guiding.
Bring your completed PHD2 logs into a focused iPhone and iPad workspace. Read the recorded displacement, choose your analysis window and keep the reasoning beside its source.
US$3.99 upfront · No subscription or in-app purchase
App Store submission in preparation. Availability follows Apple's review.
From a log to an auditable report.
Read the traces
RA and DEC time traces, actual-frame readout and displacement scatter. Scale from the header, a deliberate override or unchanged pixels.
Keep your choices
Inclusive time windows, manual excluded intervals with reasons, section notes and comparison of up to three same-unit sections.
Share the evidence
Real multi-page PDF, full parsed-row and statistics CSV, trace/scatter PNGs, unchanged original and source-backed restorable Project.json in one ZIP.
Illustration uses our original synthetic study. It is not a measured observing session.
Supported scope
Standard completed UTF-8 PHD2 guide logs up to 2 MiB, 20,000 rows and 8 guiding sections, with up to 500 INFO events per section. 20 local projects, 12 manual intervals per section; project JSON up to 4 MiB. Successful Mount rows only enter statistics; dropped, AO and error rows remain in parsed exports.
RMS is population deviation about the axis mean. Combined deviation is the square root of summed axis variances. No automatic dither removal, calibration analysis, FFT, hardware control, mechanical diagnosis or mount-setting recommendations. Modified ASIAIR, debug, calibration-only and unfinished logs are unsupported. PHD2 is an independent open-source product; Meridune is not affiliated with its developers.
Support
Contact maga40@naver.com with the app version and a description of the issue. Do not send private logs unless you intentionally choose to share them. Preserve your originals and exported Project.json; deleting the app removes local work.
Privacy policy
Effective October 3, 2026. Gobling Company does not collect data from Meridune. Logs, notes, analysis settings and projects are stored on your device. There is no account, advertising, analytics, tracking SDK, developer upload or cloud sync.
Importing uses the file you choose in Apple's Files picker. Exported files leave your device only when you select a share destination; the destination's privacy terms then apply. No personal data is transmitted to Gobling Company by the app. This website may receive ordinary hosting requests under its hosting provider's policies; these are separate from app operation.
Contact maga40@naver.com for support or privacy questions. A support email contains whatever information you choose to send.
Terms
Use logs you have the right to use. Meridune is a descriptive file-analysis tool. It does not certify a telescope, mount, guiding configuration or observing result. Keep separate backups. One upfront purchase covers the current tools, subject to Apple's purchase and refund terms.