Comparison

Sleep When I Sleep vs GridPulse

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

Head to head
About

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.

Highlights
  • Sleep detection alerts
  • Automatic audio playback pause
  • Apple Watch integration
  • Adjustable sensitivity
  • Easy start/stop functionality
Read full description

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/

About

GridPulse

Features
Read full description

When you plug in an appliance, where is the electricity actually coming from? Most of us never think about it, but the UK electricity grid’s fuel mix changes constantly. One hour it could be 60% wind, and a few hours later it could be mostly gas. The carbon intensity of your electricity can vary drastically depending on exactly when you use it. Same socket, same appliance, very different impact. GridPulse is a simple, no-nonsense utility designed to tell you exactly when the grid is greenest, right down to your local postcode. Whether you are deciding when to put the washing on, run the dishwasher, or plug in the EV, GridPulse gives you the data you need to reduce your personal carbon footprint with just a glance at your phone or watch. Key Features: - Live Local Carbon Intensity: See the exact carbon impact of the grid right now, hyper-localized to your specific UK postcode. - Smart Forecasts: Don't just look at the present. View the daily forecast to see exactly what time the grid will be the greenest so you can plan your heavy appliance usage. - Real-Time Fuel Mix: See exactly what is powering the grid at any given moment—breaking down wind, solar, nuclear, gas, and international interconnectors. - Glanceable Widgets: Includes clean, native iOS Home Screen widgets and Apple Watch complications so you don't even need to open the app to know if it's a good time to use energy. A Few Honest Caveats: - This won't save you money: Unless you are on a highly specific dynamic tariff, your energy provider may charge you the same amount per kWh regardless of whether the grid is running on wind or gas. This app is purely designed to help you reduce your personal carbon footprint. - UK Only: This app uses the live NESO (National Energy System Operator) API, meaning it only provides data for Great Britain. GridPulse is a free, independent project built to solve a simple problem: making the actual cost of our energy usage more transparent.

Screenshots

Sleep When I Sleep3 screens
GridPulse3 screens

Verdict

The call

The clearest difference is in-app purchases: GridPulse at none against Sleep When I Sleep's 1. GridPulse also leads on update cadence (every 2 days vs every 4 months). Sleep When I Sleep's advantage is iOS requirement (11.1 vs 17.0). On price, 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. Sleep When I Sleep sells 1 in-app purchase, starting at $5.49 per year. GridPulse asks for nothing beyond the download.

UpkeepUpdate frequency

Sleep When I Sleep ships an update every 4 months, GridPulse every 2 days. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 7 level
Sleep When I Sleep versus GridPulse: the parameters behind the verdict, then further details
ParameterSleep When I SleepGridPulse
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 4 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, Apple Watch
Requires iOS11.1 — better17.0
Further details — not scored
Size35 MB5 MB
Age rating4+4+
DeveloperSWIS APP LTDBence Osvath

In-app purchases

1 purchases

Sleep When I Sleep

Subscriptions1
  • 7 Day Free Trial7 Days trial$5.491 Year
None

GridPulse

No in-app purchases

Questions

Is Sleep When I Sleep free?
Sleep When I Sleep is free to download, with in-app purchases available.
Is GridPulse free?
GridPulse is free to download, with no in-app purchases.
Do Sleep When I Sleep or GridPulse have ads?
Neither Sleep When I Sleep nor GridPulse shows ads.
Which is updated more often, Sleep When I Sleep or GridPulse?
Sleep When I Sleep ships an update every 4 months, and GridPulse every 2 days. Most recently, Sleep When I Sleep was updated on October 6, 2026 and GridPulse on October 5, 2026.

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