Sleep When I Sleep vs Time Zone Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sleep When I Sleep
This app alerts you when you're falling asleep while listening to audiobooks or podcasts. It pauses playback to help you easily find your place again. It utilizes Apple Watch health data to detect sleep and offers a reset function for continued use.
- Sleep detection alerts
- Automatic audio playback pause
- Apple Watch integration
- Adjustable sensitivity
- Easy start/stop functionality
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Audiobook & podcast users know that it is almost impossible to find your place once you have fallen asleep and play has continued. SWIS – Sleep when I sleep. Here is what you will love about SWIS for iOS: It is so easy to use. SWIS alerts you that you are falling asleep & if not dismissed will pause audio playback making it easier to find where you left off in a story or podcast. SWIS detects that you are falling asleep & sends you an alert through the watch. We recommend that you stop audio playback when alerted. However, should you feel that you are not falling asleep and dismiss it the App will reset at a less sensitive level and alert you should it again detect sleep. SWIS uses health data from your Apple Watch to determine that you are falling asleep. For accuracy, this data updates throughout the day. Simply open SWIS on your watch when you are listening to audio and press Start. When alerted or when finished press Stop. Apple Watch required. DO NOT RELY ON SWIS TO ALERT YOU THAT YOU MAY BE FALLING ASLEEP WHEN DRIVING. Apple standard Terms of use apply and can be found at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Time Zone Pro
Easily track the time zones of your contacts worldwide. Avoid scheduling conflicts by seeing when your friends, family, or colleagues are awake and available. Organize contacts into groups and sync across your Apple devices.
- Time scrubbing
- Contact groups
- Cross-device sync (iOS/macOS)
- Automatic time zone detection
- Home screen widgets
- Night time indicator
- Time zone map
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We know how difficult it can be keeping track of lots of different time zones. Add your friends, family, clients or team and never schedule a call over dinner or bath time again! Latest features: ◆ Time Scrubbing Scroll through time and check what time it will be for your contacts. ◆ Contact Groups Quickly organise your contacts using our default groups: Clients, Family, Friends, Team – or create your own! ◆ iPhone, iPad and Mac Time Zone Pro is always with you on your iOS device or sitting neatly in your mac header bar. ◆ Easy time zones Add a person, search for their city and we’ll find their time zone for you. ◆ iCloud sync Contacts, time zones and avatars are automatically synced across your iOS and macOS devices. ◆ Dark mode Turn down the lights and enjoy our beautiful dark mode. Give those tired eyes a rest. ◆ Widgets Keep track of key people on your home screen. Everyone loves a good widget! ◆ Night time indicator *Whispers* If you see a moon they're probably sleeping! Wait until tomorrow! ◆ Time zone map The map indicates the location of the nearest time zone major city. This may be different to the city you select when adding a user. — Need to contact us? Visit www.timezonepro.app/support or email support@timezonepro.app
Screenshots
Verdict
The clearest difference is review sentiment: Time Zone Pro at 77% against Sleep When I Sleep's 0%. Time Zone Pro also leads on rating (4.9 vs 1.0) and in-app purchases (none vs 1). Sleep When I Sleep's advantage is price (Free vs $2.99) and iOS requirement (11.1 vs 14.0). On 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
Sleep When I Sleep is free to download; Time Zone Pro costs $2.99 up front. Sleep When I Sleep sells 1 in-app purchase, starting at $5.49 per year. Time Zone Pro asks for nothing beyond the download.
Time Zone Pro holds the better App Store score, 4.9 against 1.0. That said, the two scores are not equally well evidenced: Time Zone Pro has 29 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of Sleep When I Sleep's written reviews are positive against 77% of Time Zone Pro's.
Sleep When I Sleep ships an update every 4 months, Time Zone Pro every 3 months. Both last shipped on November 3, 2026.
| Parameter | Sleep When I Sleep | Time Zone Pro |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 1.0 (2 ratings) | 4.9 (29 ratings) — better |
| Positive reviews | 0.0% of reviews | 77.3% of reviews — better |
| Number of ratings | 2 | 29 — better |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 11.1 — better | 14.0 |
| Further details — not scored | ||
| Size | 35 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | SWIS APP LTD | Friendly Studio |
Customer experience
Sleep When I Sleep
Time Zone Pro
In-app purchases
Sleep When I Sleep
- 7 Day Free Trial7 Days trial$5.491 Year
Time Zone Pro
No in-app purchases
Questions
Is Sleep When I Sleep free?
Is Time Zone Pro free?
Which has better reviews, Sleep When I Sleep or Time Zone Pro?
Do Sleep When I Sleep or Time Zone Pro have ads?
Which is updated more often, Sleep When I Sleep or Time Zone Pro?
Other comparisons
