Comparison

DeepSpacePilot 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

DeepSpacePilot

This app helps stargazers of all levels find celestial objects visible from their location. It provides personalized difficulty ratings based on real-time weather and light pollution, ensuring a better viewing experience.

Highlights
  • Personalized celestial object difficulty ratings
  • Real-time weather and light pollution data integration
  • Curated catalog of nebulae, galaxies, and planets
  • Location-based visibility planning
  • Discover objects based on skill level
Features
Read full description

DeepSpace Pilot: Your Personal Star Guide Whether you just bought your first telescope or you've been stargazing for years, DeepSpace Pilot helps you find exactly what's worth looking at — tonight, from right where you are. Tell us your location, and we'll do the rest. DeepSpace Pilot pulls in real-time weather conditions and local light pollution data to give every celestial object a personalized difficulty rating. No more guessing whether that galaxy is actually visible from your backyard, or realizing too late that cloud cover ruined your session. What you can do with DeepSpace Pilot: Browse a curated catalog of celestial objects: nebulae, galaxies, star clusters, planets, and more. Get a personalized difficulty rating for each object based on your exact location, tonight's weather, and local light pollution Plan your sessions around what's actually observable, not just what looks good on paper Discover new objects at your skill level, whether you're just starting out or chasing deep-sky challenges The night sky is for everyone. DeepSpace Pilot makes sure you spend less time frustrated and more time looking up.

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

DeepSpacePilot2 screens
Telescope Log4 screens

Verdict

The call

The clearest difference is rating: DeepSpacePilot at 5.0 against Telescope Log's 4.5. Telescope Log's advantage is update cadence (every 3 weeks vs every 6 weeks) and device support (3 vs 1). On price, review sentiment, ratings volume and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

DeepSpacePilot holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

DeepSpacePilot ships an update every 6 weeks, Telescope Log every 3 weeks. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
DeepSpacePilot versus Telescope Log: the parameters behind the verdict, then further details
ParameterDeepSpacePilotTelescope Log
PriceFreeFree
Rating5.0 (2 ratings) — better4.5 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings22
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPad, Mac — better
Requires iOS18.618.0 — better
Further details — not scored
Size3 MB70 MB
Age rating4+4+
DeveloperAlexander SmithJawahar Natarajan

Customer experience

DeepSpacePilot

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Telescope Log

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

DeepSpacePilot

No in-app purchases

None

Telescope Log

No in-app purchases

Questions

Is DeepSpacePilot free?
DeepSpacePilot is free to download, with no in-app purchases.
Is Telescope Log free?
Telescope Log is free to download, with no in-app purchases.
Which has better reviews, DeepSpacePilot or Telescope Log?
DeepSpacePilot is rated higher. DeepSpacePilot averages 5.0 out of 5 from 2 ratings, while Telescope Log averages 4.5 from 2 ratings.
Do DeepSpacePilot or Telescope Log have ads?
Neither DeepSpacePilot nor Telescope Log shows ads.
Which is updated more often, DeepSpacePilot or Telescope Log?
DeepSpacePilot ships an update every 6 weeks, and Telescope Log every 3 weeks. Most recently, DeepSpacePilot was updated on October 8, 2026 and Telescope Log on October 15, 2026.

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