Comparison

Smart Telescope Planner vs Telescope Log

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Smart Telescope Planner

Features
Read full description

BigSky Planner helps smart telescope users prepare an observing night before they head outside. Save your observing sites, set up your smart telescope, filter a bundled target catalog, and build a timed plan for the night. Target cards show magnitude, object type, first view time, time in view, azimuth and altitude. Details adds capture guidance for your default telescope, with Min, Opt and Best integration times and filter-aware notes. Key features - Save and reuse observing sites, and mark a default - Smart telescope profiles with altitude, timing and Equatorial Mode limits for each model - Filter targets by catalog, magnitude, object type, altitude and azimuth, with exact catalog-number search - Planets, the Moon and comets - One target card per object, with its common name - Build Plan places every selected target across its Clear Sky, so the times overlap. Balance Plan and Use Priority set the time shares - An alert when a capture is shorter than 30 minutes, with a longer seat or a replacement to choose from - Weather from NOAA in the United States and MET Norway elsewhere, with no account or key. Open-Meteo works with your own key. - Save, reopen, print and share plans - Back up on iPhone or iPad and restore on a Mac or Windows PC, or the other way around - Text follows your iPhone or iPad text size - Light and dark appearance, an illustrated Help guide and a full PDF manual Free download with a 20-day free trial BigSky Planner is free to download and includes a free 20-day trial. After the trial, Full Access is a one-time in-app purchase: no subscription and no automatic charge. Your saved sites and plans are kept. If you bought the app before it became free, you keep Full Access with no additional purchase. Purchase questions: support@bigskyastro.com. Your data stays on your device. No account is required.

About

Telescope Log

This app helps telescope owners plan their night of stargazing by suggesting targets based on their equipment and sky conditions. It also provides a detailed logbook for recording observations and tracks progress towards astronomy certificates.

Highlights
  • Gear-aware target suggestions
  • Session queue and planning
  • Detailed observing logbook
  • Red field mode for night vision
  • Tracking for astronomy certificates
  • Offline functionality
  • Data export and import
Features
Read full description

Stargazing planner and telescope observing log for amateur astronomers. Know what is worth observing tonight with your telescope, your eyepieces and your sky. Then log it in seconds in a true red night mode. Works offline. No account, no ads. Pay once, no subscription. Open Darksite on a clear evening and it lays out your night like an almanac page: your dark window, the moon's schedule, the cloud outlook, and a shortlist of targets picked for your gear. Every pick explains itself in plain words: "M13: peaks 11:24 pm at 68 degrees, fits your 24 mm eyepiece, moon well out of the way, on your Herschel 400 list." No mystery scores. No thousand-object dumps. Then it runs the session. Queue your targets, work through them at the eyepiece in a genuine red field mode (every screen night-vision safe, down to a custom red keyboard), and capture each observation in seconds: hold the button, say what you saw. Date, time, site, gear, magnification and field of view fill themselves in. And it keeps your observing life. Every session searchable by object, eyepiece, sky quality or site. Messier, Herschel 400 and Lunar certificate programs track themselves as you log, with validated, coordinator-ready export packages when you are ready to submit. BUILT FOR OBSERVERS • Tonight, for your telescope: gear-aware target picks with the reasoning spelled out • Session queue: plan the night, reorder by transit, carry unfinished targets forward • A real observing log: seeing and transparency scales, sketches, voice notes, photos • Gear locker: scopes, eyepieces, filters, Barlows; true field of view, magnification and exit pupil computed for every combination • Life-lists: Messier, Herschel 400, Lunar; watch the certificates fill in • Red field mode: near-black and red everywhere, brightness floored, no white flashes • Sky events: ISS passes, meteor showers, aurora outlook, cloud and conditions YOURS, PROPERLY • Private by design: no account, no ads, no tracking. Your log lives on your device • Works fully offline: the catalog, the math and your log never need a signal • Your data is never hostage: CSV and JSON export and import, backup and restore, free, always • Pay once for Pro. No subscription. Ever. Darksite is not a planetarium. It is the missing half of the hobby: the planner and the logbook, done properly. It works alongside the sky-map app you already own.

Screenshots

Smart Telescope Planner4 screens
Telescope Log4 screens

Verdict

The call

The clearest difference is in-app purchases: Telescope Log at none against Smart Telescope Planner's 2. On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Smart Telescope Planner sells 2 one-off in-app purchases. Telescope Log asks for nothing beyond the download.

UpkeepUpdate frequency

Smart Telescope Planner ships an update every 2 weeks, Telescope Log every 3 weeks. Both last shipped on October 31, 2026.

Scorecard1 real difference · 9 level
Smart Telescope Planner versus Telescope Log: the parameters behind the verdict, then further details
ParameterSmart Telescope PlannerTelescope Log
PriceFreeFree
Rating—4.5 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS17.0 — better18.0
Further details — not scored
Size72 MB70 MB
Age rating4+4+
DeveloperRichard DerryJawahar Natarajan

In-app purchases

2 purchases

Smart Telescope Planner

One-time2
  • 20-day TrialFree
  • Full Access$9.99
None

Telescope Log

No in-app purchases

Questions

Is Smart Telescope Planner free?
Smart Telescope Planner is free to download, with in-app purchases available.
Is Telescope Log free?
Telescope Log is free to download, with no in-app purchases.
Do Smart Telescope Planner or Telescope Log have ads?
Neither Smart Telescope Planner nor Telescope Log shows ads.
Which is updated more often, Smart Telescope Planner or Telescope Log?
Smart Telescope Planner ships an update every 2 weeks, and Telescope Log every 3 weeks. Most recently, Smart Telescope Planner was updated on October 31, 2026 and Telescope Log on October 31, 2026.

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