Comparison

Rubjoy vs Ozlo Sleepbuds

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

Head to head
About

Rubjoy

Control an advanced robotic arm with your smartphone. This app connects via Bluetooth to a micro-controller, allowing you to operate powerful servo motors for complex tasks. It's designed for a serious robotic platform, not a simple toy.

Highlights
  • Bluetooth connectivity
  • Control servo motors
  • Advanced robotics
  • Smartphone interface
  • Micro-controller integration
Read full description

RUBJOY is controlled by a smartphone app that connects via Bluetooth to the advanced robotics micro controller. RUBJOYS arms are driven by two powerful metal geared digital servo motors that do all the HARD work. RUBJOY is an actual robot, not a toy.

About

Ozlo Sleepbuds

Tiny, comfortable earbuds designed for sleep. They offer all-night battery, noise blocking, and audio streaming. The companion app personalizes settings and provides sleep data reports.

Highlights
  • Ultra-comfy, low-profile design
  • All-night battery life (up to 14 hours)
  • Noise blocking for disruptive sounds
  • Bluetooth audio streaming
  • Personal in-ear alarm
  • Sleep modes and timer
  • Sleep pattern and environmental insights
Features
Read full description

Ozlo Sleepbuds® 2 are tiny, ultra-comfy earbuds designed to give you the best sleep of your life. They come with all-night battery life, noise blocking, audio streaming, and biometric sensing. The Ozlo app allows you to personalize your Sleepbuds experience, with controls for all your important settings and reports for your sleep data. LUXURIOUS COMFORT Sleepbuds are surrounded with super soft, squishy silicone tips for unparalleled all-night comfort, even for side sleepers. And they're specifically designed to be low profile, so they don't stick out causing undue pressure on your ear like other earbuds. LONG BATTERY LIFE Sleepbuds can play for up to 14 hours for all-night noise masking or streaming. The Smart Case can provide 2-3 additional charges so you can take it with you anywhere you go. SOUND, DESIGNED FOR SLEEP Sleepbuds come with precisely tuned sound that helps to reduce the impact of disruptive noise like snoring, traffic, pets, and noisy neighbors. BLUETOOTH STREAMING Your bedtime routine, your way. Stream music, podcasts, audiobooks, and soundscapes that help you relax before falling asleep. PERSONAL IN-EAR ALARM Sleepbuds private in-ear alarm gently wakes you through your Sleepbuds instead of filling the room with sound. SLEEP MODES Choose how your Sleepbuds transition into your Sleep Sound throughout the night. Whether you prefer it to start immediately, after a timer, when you fall asleep, or after streaming ends, there’s a mode that fits your routine.ontrol how your Sleep Sound works through the night. PHONE-FREE CONTROLS The new Smart Case button gives you quick, simple control over your Sleepbuds without needing to reach for your phone in the dark. TIMER Automatically turns off streaming audio or Sleep Sounds after a set amount of time, so your audio doesn't need to play all night long. SLEEP PATTERNS See how your sleep improves over time with insights into your duration, consistency, and efficiency. ENVIRONMENTAL SENSORS Discover what shapes your sleep. Your Smart Case tracks your room’s noise, light, and temperature to reveal how your environment affects your sleep over time.

Screenshots

Rubjoy4 screens
Ozlo Sleepbuds4 screens

Verdict

The call

The clearest difference is review sentiment: Rubjoy at 100% against Ozlo Sleepbuds's 44%. Rubjoy also leads on rating (5.0 vs 4.7) and iOS requirement (10.0 vs 18.0). Ozlo Sleepbuds's advantage is update cadence (weekly vs every 6 months) and ratings volume (2.8K vs 3). On price, ads, in-app purchases and monetization model 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

Rubjoy holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Ozlo Sleepbuds has 2.8K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Rubjoy's written reviews are positive against 44% of Ozlo Sleepbuds's.

UpkeepUpdate frequency

Rubjoy ships an update every 6 months, Ozlo Sleepbuds weekly. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

Scorecard5 real differences · 5 level
Rubjoy versus Ozlo Sleepbuds: the parameters behind the verdict, then further details
ParameterRubjoyOzlo Sleepbuds
PriceFreeFree
Rating5.0 (3 ratings) — better4.7 (2.8K ratings)
Positive reviews100.0% of reviews — better44.4% of reviews
Number of ratings32.8K — better
Update frequencyEvery 6 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better18.0
Further details — not scored
Size82 MB275 MB
Age rating17+12+
DeveloperWINKGRIN LLCDrowsy Digital Inc.

Customer experience

Rubjoy

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Ozlo Sleepbuds

All ratings2,803 ratings
Positive92.8%
Neutral1.7%
Negative5.5%
Written reviews385 reviews
Positive44.4%
Neutral13.5%
Negative42.1%

Bugs and requests

Rubjoy

Not enough reviews yet to summarise bugs or requests.

Ozlo Sleepbuds

Reported bugs

4 issues
  • Earbuds not charging properly in case
  • Sync issues between left and right earbuds
  • App fails to connect or update firmware
  • Sleep timer function is not working as expected

Requested features

4 requests
  • Allow custom sleep sounds and playlists
  • Add phone-free mode to use without app
  • Improve alarm features to work with phone alarms
  • Expand sound library with more options like nature sounds

In-app purchases

None

Rubjoy

No in-app purchases

None

Ozlo Sleepbuds

No in-app purchases

Questions

Is Rubjoy free?
Rubjoy is free to download, with no in-app purchases.
Is Ozlo Sleepbuds free?
Ozlo Sleepbuds is free to download, with no in-app purchases.
Which has better reviews, Rubjoy or Ozlo Sleepbuds?
Rubjoy is rated higher. Rubjoy averages 5.0 out of 5 from 3 ratings, while Ozlo Sleepbuds averages 4.7 from 2.8K ratings.
Do Rubjoy or Ozlo Sleepbuds have ads?
Neither Rubjoy nor Ozlo Sleepbuds shows ads.
Which is updated more often, Rubjoy or Ozlo Sleepbuds?
Rubjoy ships an update every 6 months, and Ozlo Sleepbuds weekly. Most recently, Rubjoy was updated on November 3, 2026 and Ozlo Sleepbuds on November 7, 2026.

Other comparisons