Comparison

LightBlue® vs YesterMorrow Countdown Clocks

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

Head to head
About

LightBlue®

This app allows users to interact with Bluetooth Low Energy devices. It supports scanning for, connecting to, and analyzing BLE peripherals, as well as simulating your own BLE devices. It's a comprehensive tool for developers and enthusiasts working with BLE technology.

Highlights
  • Scan and discover BLE peripherals
  • Connect and view device profiles
  • Read and write characteristics
  • Subscribe to notifications
  • Create and advertise virtual BLE devices
  • Clone peripheral profiles
  • Log and share BLE events
Features
Read full description

LightBlue® by Punch Through® Your ultimate BLE debugging and development toolkit. Trusted by BLE developers and engineers since 2012 to scan, inspect, and troubleshoot Bluetooth Low Energy devices with precision. Scan For Peripherals  Discover, connect, and interact with nearby BLE devices. Quickly view advertising peripherals, sort by signal strength (RSSI), and connect with a single tap. Once connected, explore the device's advertisement data, services, and characteristics. Isolate SDK Issues  Simplify debugging by pinpointing issues in your BLE SDKs. LightBlue lets you isolate your app's business logic and focus on core tasks like connecting, scanning, reading, writing, and receiving notifications, built on years of BLE development experience and platform best practices. Mimic Your Devices  Prototype your application by creating virtual BLE peripherals. Build a profile from scratch or clone an advertising peripheral to mimic your product's functionality, even before your own firmware is ready. Key features: - Scan and discover BLE peripherals nearby - Browse services and characteristics in detail - Read, write, and subscribe to notifications and indications - Send data from notifications to AWS IoT or Adafruit IO via Cloud Connect - Write to characteristics in Hex, Octal, Binary, Decimal, or ASCII - Clone peripheral profiles or build your own from scratch - Advertise as a custom peripheral to simulate your device - Thoroughly log and share BLE events - Available on iPhone, iPad, Mac, and Android LightBlue started in 2012 as an internal tool. Punch Through built it to test and debug BLE devices while working on client projects. It worked well, so we shared it with the community. We've kept it free ever since. Today, LightBlue is used by solo developers and engineering teams alike, including inside some of the world's most respected tech and device companies.

About

YesterMorrow Countdown Clocks

Visually track important dates with customizable countdowns and count-ups. Choose from various widget styles and personalized themes to make time personal and easy to glance at. Your events are private and stored locally.

Highlights
  • Countdown and count-up timers
  • Multiple widget styles
  • Personalized themes
  • Flexible time formats
  • Private and lightweight
  • No ads
Features
Read full description

Time looks different depending on the moment. Whether you’re counting down to something big or tracking how long it’s been since a meaningful day, this app turns time into something personal, visual, and easy to glance at. Create elegant countdowns and count-ups for: • Birthdays • Vacations • Holidays • Anniversaries • School events • Sports seasons • Concerts • Habits & goals • Life milestones • Anything important to you FEATURES • Countdown or count-up timers Track time forward or backward with flexible event settings. • Multiple widget styles Choose from modern, retro, minimal, bold, and aesthetic widget designs for your Home Screen and Lock Screen. • No ads Ever. No interruptions, popups, or clutter. • Fast and simple Create events in seconds with a clean, easy-to-use interface. • Personalized themes Mix vintage-inspired looks with sleek futuristic styles. • Flexible time formats Display years, months, days, hours, minutes, or seconds depending on your preference. • Designed for everyday use Perfect for tracking upcoming events, memories, routines, and long-term goals. FROM RETRO TO FUTURE Some moments feel nostalgic. Others feel like the start of something new. This app is designed to fit both — with widget styles and themes inspired by classic clocks, modern displays, and everything in between. Whether you want a cozy vintage vibe or a sleek futuristic dashboard, your timers can match your style. PRIVATE & LIGHTWEIGHT Your events stay on your device. No accounts required. No ads. No subscriptions. Just time.

Screenshots

LightBlue®4 screens
YesterMorrow Countdown Clocks4 screens

Verdict

The call

The clearest difference is rating: YesterMorrow Countdown Clocks at 5.0 against LightBlue®'s 4.4. YesterMorrow Countdown Clocks also leads on monetization model (free vs ad-supported). LightBlue®'s advantage is update cadence (every 3 weeks vs every 5 months) and ratings volume (943 vs 1). On price, ads, 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.

ReceptionRating · Positive reviews · Number of ratings

YesterMorrow Countdown Clocks holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: LightBlue® has 943 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

LightBlue® ships an update every 3 weeks, YesterMorrow Countdown Clocks every 5 months. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
LightBlue® versus YesterMorrow Countdown Clocks: the parameters behind the verdict, then further details
ParameterLightBlue®YesterMorrow Countdown Clocks
PriceFreeFree
Rating4.4 (943 ratings)5.0 (1 ratings) — better
Positive reviews66.2% of reviews—
Number of ratings943 — better1
Update frequencyEvery 3 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, Mac — betteriPhone, iPad
Requires iOS16.4 — better17.0
Further details — not scored
Size22 MB3 MB
Age rating4+4+
DeveloperPunch ThroughAllen Gaiownik

Customer experience

LightBlue®

All ratings942 ratings
Positive83.3%
Neutral3.8%
Negative12.8%
Written reviews293 reviews
Positive66.2%
Neutral6.1%
Negative27.6%

YesterMorrow Countdown Clocks

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

LightBlue®

Reported bugs

3 issues
  • Crashes after updates
  • Fails to connect Apple Pencil
  • Doesn't detect all nearby devices

Requested features

3 requests
  • Ability to manually name devices
  • More precise location tracking
  • Integration with Siri/Shortcuts

YesterMorrow Countdown Clocks

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

LightBlue®

No in-app purchases

None

YesterMorrow Countdown Clocks

No in-app purchases

Questions

Is LightBlue® free?
LightBlue® is free to download, with no in-app purchases.
Is YesterMorrow Countdown Clocks free?
YesterMorrow Countdown Clocks is free to download, with no in-app purchases.
Which has better reviews, LightBlue® or YesterMorrow Countdown Clocks?
YesterMorrow Countdown Clocks is rated higher. LightBlue® averages 4.4 out of 5 from 943 ratings, while YesterMorrow Countdown Clocks averages 5.0 from 1 ratings.
Do LightBlue® or YesterMorrow Countdown Clocks have ads?
Neither LightBlue® nor YesterMorrow Countdown Clocks shows ads.
Which is updated more often, LightBlue® or YesterMorrow Countdown Clocks?
LightBlue® ships an update every 3 weeks, and YesterMorrow Countdown Clocks every 5 months. Most recently, LightBlue® was updated on November 1, 2026 and YesterMorrow Countdown Clocks on October 31, 2026.

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