Comparison

atmospherePro vs Twilight Time

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

Head to head

atmospherePro

Activate atSign to share files

About

atmospherePro

Read full description

atmospherePro makes truly encrypted file transfer possible. After activating your atSign with atmospherePro, you can: - Send files across any device regardless of your location. - Share contracts, tax information, and other confidential information without worrying about your data being stored on a server in the cloud. - Files are totally private.

About

Twilight Time

Features

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Shows the time before sunrise and after sunset when the sun is below the horizon and it is bright outside (twilight). Twilight 1. Civil twilight 2. Nautical twilight 3. Astronomical twilight

Screenshots

atmospherePro4 screens

Twilight Time1 screens

Verdict

The call

The clearest difference is ads: atmospherePro at none against Twilight Time's shown. atmospherePro also leads on device support (4 vs 2) and iOS requirement (13.0 vs 16.7.10). Twilight Time's advantage is update cadence (every 2 weeks vs every 2 months). On price and in-app purchases 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.

UpkeepUpdate frequency

atmospherePro ships an update every 2 months, Twilight Time every 2 weeks. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 2 level

atmospherePro versus Twilight Time: the parameters behind the verdict, then further details
Parameter	atmospherePro	Twilight Time
Price	Free	Free
Update frequency	Every 2 months	Every 2 weeks — better
Ads	No — better	Yes
In-app purchases	No	No
Devices	iPhone, iPad, iPod, Mac — better	iPhone, iPad
Requires iOS	13.0 — better	16.7.10
Further details — not scored
Size	38 MB	36 MB
Age rating	17+	4+
Developer	Atsign	Hideaki Uchikoshi

In-app purchases

None

atmospherePro

No in-app purchases

None

Twilight Time

No in-app purchases

Questions

Is atmospherePro free?

atmospherePro is free to download, with no in-app purchases.

Is Twilight Time free?

Twilight Time is free to download, with no in-app purchases.

Do atmospherePro or Twilight Time have ads?

Twilight Time shows ads; atmospherePro does not.

Which is updated more often, atmospherePro or Twilight Time?

atmospherePro ships an update every 2 months, and Twilight Time every 2 weeks. Most recently, atmospherePro was updated on October 7, 2026 and Twilight Time on October 9, 2026.