Comparison

Alarm Clock HD vs VoltSlide

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

Head to head
About

Alarm Clock HD

Wake up refreshed with customizable alarms and sleep tracking. Enjoy your favorite music as an alarm, track your sleep patterns, and utilize features like a built-in flashlight and local weather updates. Offers a premium subscription for an ad-free experience and enhanced support.

Highlights
  • Unlimited alarms with music or custom sounds
  • Sleep tracking and analysis
  • Customizable nightstand display
  • Integrated flashlight
  • Local weather information
  • Sleep timer
Features
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Sleep better and start the day with your favorite tunes. Are you curious to see how much you slept? Then, track your sleep in the app. Alarm Clock HD is the app to help you enjoy restful sleep and wake up worry-free. How Alarm Clock HD helps you sleep better: • Unlimited Alarms: Apple Music or Alarm Sounds • Customize Nightstand display colors • Sleep Timer • Local Weather Information • Instant Flashlight - shake the device • Full watchOS 2 support • Screen Saver - for devices with OLED display WAKE UP ON TIME: Proper Alarm Settings • Keep the app open and running always to have your alarm go off and play the sounds you’ve set for ‘Music'. When your app is open, you can use the volume slider within the app. When the app is in the background, use the device volume to set your volume. • Make sure your battery is charged and have your notifications turned on before you go to sleep, when the battery level goes below 30% it might not sound. This is due to prevent the device from dying and the alarm not going off. • Keep your Apple Music available on your device The music you can select consists of everything you have available on your ‘Apple Music' app on your device. If the music is saved on your iCloud, and not on the device itself, it won’t be available. NEVER MISS AN ALARM When you close the app and do not have it running in the background, the alarm will use the device volume instead and play the notification sound system. The app will close itself automatically after 10 hours of inactivity. This is due to prevent the device from dying and the alarm not going off. When your device is muted, set to ‘Do Not Disturb’, or your device volume is set to 0, the alarm won’t play properly. It will still show the notification without any sound. This is due to Apple’s restrictions as we are unable to access the app settings when the app is closed, only when it’s open or running in the background. SUBSCRIPTION IN ALARM CLOCK HD Upgrade to a Premium Membership and receive the following ongoing value: • Ad-Free • News & X feeds (Twitter) • Premium Customer Support Terms & Conditions: https://impalastudios.com/terms Privacy Policy: https://impalastudios.com/privacy >> WE LOVE FEEDBACK As always, we appreciate your feedback. Please email us at support@impalastudios.com with any suggestions or questions, our support team is ready and happy to help. WAKE UP YOUR WAY, EVERY DAY

About

VoltSlide

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YOUR EV COSTS, CLEARLY TRACKED. VoltSlide is a private iOS app for EV owners who want real cost and efficiency insight — without daily data entry. Most EV trackers expect you to log every charge. VoltSlide doesn’t. Log public charging and expenses as they happen, then enter your home charger or utility totals once a month. You get a complete picture of your EV’s true cost per kilometer, with far less friction. HOW VOLTSLIDE WORKS ON THE GO Whenever you charge away from home or incur a vehicle cost, log it right away: • Public and DC fast charging — kWh, cost, session fees, and idle fees • Optional odometer, location, and receipt photo • Maintenance and expenses — registration, repairs, accessories, and more • Seasonal tire swaps to track how different sets affect efficiency AT HOME With a connected Level 2 charger, skip the nightly log. On the 1st of each month, enter your charger app’s cumulative kWh and cost (ChargePoint, Grizzl-E, Wallbox) in one entry. Optional monthly reminders keep home energy up to date. YOUR GARAGE Keep everything about your EV in one place: • Multiple vehicles — photo, name, and km or miles per car • Odometer readings and distance travelled • Service history with optional dated reminders • Expenses, trips, and tire sets with install dates and odometer snapshots • Purchase price, date, and optional depreciated value for ownership reporting DASHBOARD See how your EV is performing at a glance: • Efficiency gauge with km/kWh or mi/kWh and trend vs the prior period • Energy donut — home, public, and DC fast charging split • Distance travelled with a trend chart for your selected range • Energy cost, total operating cost, and cost per km or mile • Quick date chips: 3 months, month, year, all time, or custom range • Home / Public / All scope to focus on the costs you care about COMPARE TO GAS See how your EV stacks up against gas over the same distance and date range. Choose NRCan 2026 ICE class averages — subcompact, compact SUV, sedan, or pickup — or enter your own efficiency and gas price in Settings. Share a comparison card. REPORTS Custom date-range reports: • ENERGY — home, public, and total kWh • COSTS — energy, service, expenses, and all-in total; depreciation shown separately • RATES — cost per kWh, per day, and per distance unit • Monthly and yearly cost predictions from your recent driving • PDF export plus shareable stat and prediction cards LOG Three entry types, one clean interface: • Public charge — DC fast or AC/L2 with fees, location, photo, and optional odometer • Home energy — monthly kWh and cost from your smart charger or utility bill • Odometer — standalone mileage readings • Edit saved entries — adjust cost per kWh, log type, or odometer after the fact IMPORT AND EXPORT Your data stays portable: • Full VoltSlide CSV backup — vehicles, charging, odometer, service, expenses, trips, tires, and photos • Import a backup to restore or move data between devices • Import from Road Trip (CSV) — fuel, maintenance, and tire history • Choose the destination vehicle, or create a new one on import OPTIONAL iCLOUD SYNC Turn on iCloud sync to keep a garage tied to your Apple ID. VoltSlide keeps separate on-device and iCloud garages — sync switches to iCloud; it does not merge automatically. Export a CSV backup first. After changing sync, swipe VoltSlide away and reopen. PRIVATE BY DESIGN • No account required • No ads, tracking, or third-party analytics • Your records stay on your device • iCloud sync uses your Apple ID — VoltSlide does not collect or sell your data DESIGNED FOR REAL EV DRIVERS VoltSlide is for people who want honest answers: What does it cost to drive my EV? How efficient is it across seasons? Am I saving vs gas? No spreadsheet or daily logging required. Questions or feedback: support@voltslide.app Privacy policy: https://voltslide.app/#privacy

Screenshots

Alarm Clock HD4 screens
VoltSlide4 screens

Verdict

The call

The clearest difference is in-app purchases: VoltSlide at none against Alarm Clock HD's 10. VoltSlide also leads on ads (none vs shown). On price, device support and iOS requirement 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. Alarm Clock HD sells 10 in-app purchases, starting at $1.49 per month. VoltSlide asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Alarm Clock HD versus VoltSlide: the parameters behind the verdict, then further details
ParameterAlarm Clock HDVoltSlide
PriceFreeFree
Rating4.5 (105K ratings) — better—
Positive reviews31.6% of reviews—
Number of ratings105K — better—
Update frequencyFortnightly—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size234 MB4 MB
Age rating4+4+
DeveloperImpala StudiosALEXANDER JOHN PANDELIDIS

Bugs and requests

Alarm Clock HD

Reported bugs

4 issues
  • Alarm randomly snoozing itself
  • Alarm not working when phone is muted
  • Alarm sound not playing
  • Alarm screen freezing/crashing

Requested features

4 requests
  • 24-hour clock option
  • More alarm sounds/tones
  • Ability to use own music files
  • Do not disturb mode

VoltSlide

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Alarm Clock HD

Subscriptions10
  • Premium member - 1 month$1.491 Month
  • Premium Features - Weekly$1.997 Days
  • Premium Features - Monthly3 Days trial$2.591 Month
Show 7 more
  • Upgrade to Premium Features$5.496 Months
  • Premium Yearly$9.991 Year
  • Premium Yearly3 Days trial$11.991 Year
  • Upgrade Your Alarm Clock3 Days trial$14.991 Year
  • Premium yearly$19.991 Year
  • Premium yearly3 Days trial$19.991 Year
  • Premium yearly3 Days trial$29.991 Year
None

VoltSlide

No in-app purchases

Questions

Is Alarm Clock HD free?
Alarm Clock HD is free to download, with in-app purchases available.
Is VoltSlide free?
VoltSlide is free to download, with no in-app purchases.
Do Alarm Clock HD or VoltSlide have ads?
Alarm Clock HD shows ads; VoltSlide does not.

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