Comparison

JustPayApp vs Blacklyf

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

Head to head
About

JustPayApp

Features
Read full description

Say goodbye to Loyalty cards. Welcome to the world of JustPay, a loyalty app where you start earning rewards with every purchase you make. Unlock the savings in three easy steps- download the app from the store, register and visit the participating retail outlets of your choice and enroll by scanning the QR code. Earn reward$ everytime you shop with JustPay.

About

Blacklyf

This app connects to smartwatches to track daily activity, sleep patterns, and health metrics. It allows for watch face customization, smart alarms, and notification management. Users can also control media, manage calls, and ensure data privacy.

Highlights
  • All-day activity and sleep tracking
  • Watch face personalization
  • Smart alarms and reminders
  • Notification management
  • Remote media and call control
  • Intuitive interface
Read full description

Blacklyf – Smart Health and Fitness Companion Connect, monitor, and improve your health with Blacklyf, the versatile companion app for all BLACK FIT series smartwatches. All-Day Activity and Sleep Tracking • Seamlessly track steps, calories, and sleep cycles (light, deep, and REM) with automatic syncing with your BLACK wearable. • View weekly and monthly trends to gain insights and stay motivated. Watch Face Personalization • Choose from a variety of pre-installed themes or upload your own for a unique look. Note: Dynamic watch faces may affect battery life. Smart Alarms and Reminders • Set a gentle, silent alarm to wake you up refreshed. • Configure notifications for incoming calls, text messages, and social apps (WhatsApp, Facebook, Instagram) to gently vibrate on your wrist. Remote Control of Media and Calls • Manage music playback and camera functions directly from your wearable. • Make calls via Bluetooth connection—Use the "Talk Watch" pairing feature to make and receive calls right from your wrist. Intuitive Interface • Browse your activity log, monitor metrics, and manage connected devices with a simple bottom-tab layout. Data Privacy and Security • Data is encrypted; only your location and device ID are shared, not your identity. Blacklyf is a reliable, flexible, and privacy-focused app for anyone who wants to get the most out of their BLACK wearable. Easily track your health, manage notifications, and personalize your watch.

Screenshots

JustPayApp4 screens
Blacklyf4 screens

Verdict

The call

The clearest difference is ads: JustPayApp at none against Blacklyf's shown. On price, update cadence, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

JustPayApp ships an update every 3 months, Blacklyf every 4 months. The most recent releases landed on May 16, 2026 and September 15, 2026 respectively.

Scorecard1 real difference · 9 level
JustPayApp versus Blacklyf: the parameters behind the verdict, then further details
ParameterJustPayAppBlacklyf
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 3 months — betterEvery 4 months
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.413 — better
Further details — not scored
Size53 MB387 MB
Age rating4+4+
DeveloperLotus Technologies Ltd.CANNUR MARKETING LTD

In-app purchases

None

JustPayApp

No in-app purchases

None

Blacklyf

No in-app purchases

Questions

Is JustPayApp free?
JustPayApp is free to download, with no in-app purchases.
Is Blacklyf free?
Blacklyf is free to download, with no in-app purchases.
Do JustPayApp or Blacklyf have ads?
Blacklyf shows ads; JustPayApp does not.
Which is updated more often, JustPayApp or Blacklyf?
JustPayApp ships an update every 3 months, and Blacklyf every 4 months. Most recently, JustPayApp was updated on May 16, 2026 and Blacklyf on September 15, 2026.

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