Comparison

SLYNUMBER vs Clusterix Email

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

Head to head
About

SLYNUMBER

Get a real, private mobile number for calls and texts without a carrier contract. Protect your personal information and separate your communications for business, dating, or travel.

Highlights
  • Real mobile numbers, not VoIP
  • Unlimited inbound calls & texts
  • 100 outbound credits monthly
  • Privacy and anonymity
  • Spam blocking & do-not-disturb
  • AI-powered features
  • eSIM for global data
Features
Read full description

NOT TO BRAG, WE ARE THE BEST SLYNUMBER is not just another second number app. SLYNUMBER is the ONLY provider on the market to offer real mobile numbers. We don't provide VoIP, fake phone numbers, or second lines that only work for a week. This distinction is crucial because many apps and online services do not accept VoIP numbers. SLYNUMBER works everywhere! To put is simply - unless you're willing to sign up with a major carrier like T-Mobile, Verizon, or AT&T and commit to an expensive plan with a SIM card and monthly bills, we are your ONLY alternative for obtaining an actual mobile number. Moreover, we prioritize your privacy and anonymity, allowing you to share your number with strangers, clients, acquaintances, blind dates, or anyone else without the fear of being tracked or spied on. HOW SLYNUMBER WORKS Setting up SLYNUMBER is fast and easy! Simply, download the app onto your phone, pick your number and start calling and texting. SLYNUMBER can do everything your primary mobile number can but with added privacy and some really cool features. We offer the most reliable and fully featured virtual phone number app available, with calling & texting features that include free toll-free calls, blocking, muting, and do-not-disturb mode, caller name & ID settings, SlyAI (running on ChatGPT-4), call forwarding, and number porting. And now we also offer an eSIM feature that will allow you to activate cellular data anywhere in the world. We are you one-stop shop for all things mobile. Use it for: -Privacy & keeping your information safe -Separating personal and transactional numbers -Your business needs -Job applications -Traveling abroad -Communicating freely with spam blocking & muting -Setting boundaries with do-not-disturb settings -Online or in-person dating Your private phone number can be risky if it falls into the wrong hands. Our main protective measure is ensuring that SLYNUMBER does not gather any personal information apart from what is required for processing payments, which remains inaccessible. Using SLYNUMBER, you can establish barriers through features like spam call blocking and do-not-disturb settings to guarantee that you always have control over your communications. PLANS & PRICING SLYNUMBER is a subscription-based app, offering you two simple ways to enjoy a second mobile number & complete privacy that comes with it. 3-MONTH BASE PLAN: $4.99/mo (billed every 3 months at $14.99). The plan includes unlimited inbound calling and texting and 100 monthly outbound credits for calling and texting ANNUAL PLAN: $4.18/mo (billed annually at $49.99) The plan includes unlimited inbound calling and texting and 100 monthly outbound credits for calling and texting ADDITIONAL OUTBOUND CREDITS: 1000 credits for $10 (1 credit equals to 1-min call or 1 text message) SUBSCRIPTION DETAILS All subscriptions include unlimited inbound calls and texts, and 100 outbound credits (1 credit equals to 1-min call or 1 text message). If credits are used additional outbound credits may be purchased. Subscriptions automatically renew unless canceled. Subscriptions can be managed by the user through the app. For any further assistance, contact support@slynumber.com International calling rates vary based on the country you're calling. THE FINE PRINT Privacy Policy: https://slynumber.com/privacy-policy.html Terms of Use: https://slynumber.com/terms.html IMPORTANT: Please review our pricing before purchasing - SLYNUMBER has no free trial period. Outbound phone calls and text messages require an additional purchase of credits. Area code availability varies.

About

Clusterix Email

Streamline your communication with an advanced email client. Features include a signature editor, customizable templates, an AI assistant for composing and managing emails, and scheduled sending. Organize and view your messages with an intuitive interface.

Highlights
  • Customizable signature editor
  • Intuitive email editor
  • Diverse customizable templates
  • AI assistant for composing and inbox management
  • Scheduled email sending
  • User-friendly email viewing interface
Features
Read full description

InnOS Email: Revolutionize Your Email Experience with Advanced Features Discover the future of emailing with InnOS Email, your ultimate email solution designed for efficiency and ease. Our innovative platform includes a range of cutting-edge features: Signature Editor: Create and customize your unique email signatures, adding a professional touch to every email you send. Email Editor: Craft your messages with ease using our intuitive email editor. Whether it's a quick reply or a detailed report, our editor makes writing emails a breeze. Templates: Save time with our diverse range of customizable templates. From business proposals to friendly greetings, you'll find the perfect template for every occasion. AI Assistant: Harness the power of artificial intelligence to enhance your email experience. Our AI assistant helps with composing emails, suggesting responses, and managing your inbox efficiently. Scheduled Email: Plan and schedule your emails to be sent at the perfect time, ensuring you never miss an important date or event. Email View: Experience seamless email viewing with our user-friendly interface. Easily navigate through your inbox, organize emails, and focus on what matters most. InnOS Email is more than just an email client; it's a comprehensive tool designed to optimize your communication and productivity. Join us and elevate your email experience to new heights! [:mav: 3.2.6]

Screenshots

SLYNUMBER4 screens
Clusterix Email4 screens

Verdict

The call

The clearest difference is review sentiment: Clusterix Email at 100% against SLYNUMBER's 33%. Clusterix Email also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 8). SLYNUMBER's advantage is ratings volume (2.6K vs 1) and chart position (#164 vs unranked). On price, update cadence, 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. SLYNUMBER sells 8 in-app purchases, starting at $10.00 per year. Clusterix Email asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Clusterix Email holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: SLYNUMBER has 2.6K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of SLYNUMBER's written reviews are positive against 100% of Clusterix Email's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 22, 2026 and October 6, 2026 respectively.

Scorecard7 real differences · 4 level
SLYNUMBER versus Clusterix Email: the parameters behind the verdict, then further details
ParameterSLYNUMBERClusterix Email
PriceFreeFree
Rating4.5 (2.6K ratings)5.0 (1 ratings) — better
Positive reviews33.3% of reviews100.0% of reviews — better
Number of ratings2.6K — better1
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
Best chart rank#164 — better—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.6 — better
Further details — not scored
Size96 MB60 MB
Age rating4+4+
DeveloperMobileSphere, Ltdinnoscripta SE

Customer experience

SLYNUMBER

All ratings2,556 ratings
Positive87.4%
Neutral3.7%
Negative9.0%
Written reviews222 reviews
Positive33.3%
Neutral8.6%
Negative58.1%

Clusterix Email

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

SLYNUMBER

Reported bugs

4 issues
  • App won't load past the launch screen
  • Incoming calls have no audio
  • Text messages fail to deliver
  • Subscription issues and inability to cancel

Requested features

4 requests
  • Add ability to send and receive pictures and videos
  • Improve app stability and reduce crashes
  • Provide better customer support and communication
  • Offer more affordable pricing options

Clusterix Email

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

SLYNUMBER

Subscriptions3
  • Global eSIM data plan$10.001 Year
  • Three-Month Plan$14.993 Months
  • Yearly Plan$49.991 Year
One-time5
  • SLYNUMBER eSIM$3.00
  • 10 Dollar Credit Bundle$10.00
  • 25 Dollar Credit Bundle$25.00
Show 2 more
  • 50 Dollar Credit Bundle$50.00
  • 100 Dollar Credit Bundle$100.00
None

Clusterix Email

No in-app purchases

Questions

Is SLYNUMBER free?
SLYNUMBER is free to download, with in-app purchases available.
Is Clusterix Email free?
Clusterix Email is free to download, with no in-app purchases.
Which has better reviews, SLYNUMBER or Clusterix Email?
Clusterix Email is rated higher. SLYNUMBER averages 4.5 out of 5 from 2.6K ratings, while Clusterix Email averages 5.0 from 1 ratings.
Do SLYNUMBER or Clusterix Email have ads?
Neither SLYNUMBER nor Clusterix Email shows ads.
Which is updated more often, SLYNUMBER or Clusterix Email?
SLYNUMBER ships an update every 2 weeks, and Clusterix Email every 2 weeks. Most recently, SLYNUMBER was updated on October 22, 2026 and Clusterix Email on October 6, 2026.

Other comparisons