# Astronomy Logbook & Star Diary — Astronomy observation log

> Astronomy observation log (iPhone/iPad app by LEAN ASIA CO., LTD.)

- Source: https://appshunter.io/ios/app/astronomy-logbook-and-star-diary/id6772146172 (this page in markdown: same URL + `.md`)
- Developer: [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814)
- Category: Reference, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: English
- Released: 2026-06-08
- Data updated: 2026-09-09
- User reviews in markdown: https://appshunter.io/ios/app/astronomy-logbook-and-star-diary/id6772146172/reviews.md

## What is Astronomy Logbook & Star Diary?

Your nights at the eyepiece deserve better than a note on the back of a star chart. StarSpot is an astronomy logbook built for one moment: you just came in from a session, and you want it on the record before the details fade.

Sky maps show you what is up tonight. StarSpot remembers what YOU actually saw — which night, which scope, which eyepiece, how steady the air was, and what you wrote while it was still fresh. Sessions are grouped the way astronomers count them: an observation at 1 a.m. belongs to the evening it started, not the next calendar day.

WHAT YOU GET

• A logbook that fills itself in: pick your saved scope and eyepiece and the magnification is calculated for you
• Every entry carries the seeing, rated 1–5 from Poor to Excellent, so "was Saturn this sharp last autumn?" has an answer
• The Messier 110 as a living checklist — tick off M42, see at a glance which of Charles Messier's objects you still owe yourself
• Charts that show what you observe most, your streak of consecutive clear nights, and your best seeing so far
• Red night mode across the whole app, so checking your log at the eyepiece doesn't cost you your dark adaptation
• One-tap CSV export — your complete logbook opens in any spreadsheet, forever yours

PERFECT FOR

• Backyard observers who want each session to count toward something
• Messier hunters working through the catalogue object by object
• Owners of more than one scope or eyepiece who are tired of doing focal-length math in the dark
• Anyone returning to the hobby who wishes they had records from the first time around

WHY NOT JUST A PLANETARIUM APP?

Planetariums answer "what's up there?" — and forget you the moment you close them. Ten years of observing leaves nothing behind. StarSpot is the other half of the hobby: the permanent record. Use your favourite sky map to find the target; use StarSpot so the night is never lost.

PRIVATE BY DEFAULT

Your logbook lives on your iPhone. No account, no server, no analytics — the app makes no network requests of its own. Export your data whenever you like; it never leaves the device unless you send it somewhere yourself.

FULL ACCESS

StarSpot Pro unlocks the complete app: the observing logbook and editor, charts, streaks and best nights, the Messier 110 checklist, and equipment profiles with automatic magnification. Choose a weekly or yearly auto-renewing subscription, or a lifetime plan with a single one-time payment. Prices are shown in the app before you commit, and you can restore a previous purchase at any time.

Log tonight's session before it fades — your future self at the eyepiece will thank you.

Terms of Use: https://leanstudio.asia/terms-of-use
Privacy Policy: https://leanstudio.asia/privacy-policy
Support: support@leanstudio.asia


## Version history (last 2 releases)

### 1.1 — 2026-09-03

First release of StarSpot.

### 1.0 — 2026-06-08

No release notes.

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All apps by LEAN ASIA CO., LTD: https://appshunter.io/developer/1815050814

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*