Comparison

Onoff Numbers vs SIPHER

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

Head to head
About

Onoff Numbers

Get a second phone number instantly through an app, without needing a new SIM card or device. Keep your personal and professional lives separate, protect your privacy, and make international calls at low costs. Manage calls, SMS, and voicemail all in one place.

Highlights
  • Second phone number
  • Separate professional and personal lines
  • Privacy protection
  • Low-cost international calls
  • Integrated visual voicemail
  • Port existing numbers
  • Numbers from 30+ countries
Features
Read full description

What if you could get a second number in minutes, without the hassle of using a second phone or a second SIM card, but just by downloading an app? You dreamed of it, Onoff made it happen! You will want to use a second number for: Having a separate professional line - separate your professional and personal life Protecting your privacy when you are online - your safety is our priority Selling goods online in total confidence - safely communicating with your potential buyers Carrying only one phone on you - less weight in your pocket, less hassle between switching the phones Being able to use your phone number from any smartphone and even from your web browser - we want you to have a number as flexible as your email! Make low-cost international calls - the world is just one call away With Onoff, you also have: -Calls and SMS -Integrated visual voicemail -Voice messages -Synchronization of all your contacts list -Possibility of porting an existing number, in order to use it in the Onoff App -An app compatible with all SIM cards to always call on the best network -Numbers from more than 30 countries available And there’s much more ! You can follow us on: Facebook - Linkedin - Twitter - Instagram In the application, you can subscribe to a number or a calling plan, the prices of which vary depending on the nationality or region chosen, as well as the duration (1, 3 or 12 months). Payment will be made through your iTunes account after confirmation of purchase, and will be withdrawn 24 hours before the end of each billing cycle. You can deactivate automatic renewal in the settings of the App Store after purchase, at least 24 hours before the end of the current subscription period. With your Onoff number, you can make unlimited calls throughout Europe. For communication outside of Europe, you can also purchase credits, valid for any destination! Any demonstration product offered within promotions will be automatically terminated upon first purchase. We cannot guarantee the systematic compatibility of numbers with verification services by SMS. Onoff: several numbers in one application, without changing the SIM card! See https://www.onoff.app/en/privacy-policy for the Privacy Policy. Onoff app Terms and Conditions can be found at https://www.onoff.app/en/terms-conditions/

About

SIPHER

This app allows you to create discreet conversations that appear normal on the surface, protecting your private messages. It generates realistic chat threads from a customizable keyboard, ensuring your privacy is maintained even when others are looking.

Highlights
  • Create cover conversations
  • Generate realistic chat threads
  • Discreet messaging from keyboard
  • Customizable cover topics
  • Privacy protection
  • Pro subscription for enhanced features
Read full description

Sipher is a privacy app built for real life—when you need to keep something discreet, but still look natural on your phone. Create a cover conversation: a chat that appears completely normal on the surface, while protecting what you actually want to keep private. Choose a credible topic, generate a clean and realistic thread, and maintain a natural look if someone happens to glance at your screen. Simple, fast, and designed for mobile, Sipher turns privacy into a discreet, intelligent experience you can actually use every day. HOW IT WORKS 1. Set up your cover Pick who the conversation is for and what it should look like on the surface—plans, work talk, gossip, movies, food, and more. 2. Generate a believable chat Sipher creates a realistic conversation that feels natural, so your screen never looks suspicious. 3. Stay discreet in the moment Your cover conversation helps you keep things private when someone is nearby or looking over your shoulder. 4. Use it from your keyboard Send and manage protected messages directly from the Sipher keyboard in your favorite messaging apps. FREE PLAN Sipher includes a free plan with usage limits (such as limits on active secret codes and daily message hiding). Current limits are shown in the app and may change over time. SIPHER PRO SUBSCRIPTION Upgrade to Sipher Pro to unlock enhanced features, including: • Higher or unlimited quotas • More active secret codes • Advanced keyboard customization • Pro-only themes and personalization Sipher Pro is available as an auto-renewing subscription with the following options: • Weekly • Annual Promotional or retention offers may be available from time to time. The price, billing period, and any free trial or introductory offer terms are always displayed in the App Store and in the in-app purchase flow before you confirm payment. Pricing may vary by country or region. SUBSCRIPTION TERMS (APPLE) Payment will be charged to your Apple ID account at the confirmation of purchase. Your subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period at the rate shown at purchase. You can manage or cancel your subscription at any time in your Apple ID account settings: Settings → Apple ID → Subscriptions If a free trial or introductory offer is available, eligibility, duration, and conversion to a paid subscription will be disclosed at the time of offer. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. Refund requests for App Store purchases must be submitted to Apple in accordance with Apple’s refund policies. Restore purchases is available in the app if you reinstall Sipher or switch devices. LEGAL Privacy Policy: https://getsipher.notion.site/Sipher-Privacy-Policy-bdb822410890497794776c62e940dc7f Terms of Service: https://getsipher.notion.site/Sipher-Terms-of-Service-4f4f624464524ae19f110447b3d61fc3 EULA (Apple Standard License Agreement) : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Sipher is for personal, lawful use. You stay in control of what you share and with whom. Download Sipher and turn privacy into something simple, smart, and discreet.

Screenshots

Onoff Numbers4 screens
SIPHER4 screens

Verdict

The call

The clearest difference is review sentiment: SIPHER at 75% against Onoff Numbers's 44%. SIPHER also leads on rating (5.0 vs 4.6). Onoff Numbers's advantage is ratings volume (793 vs 7). On price, update cadence, ads and in-app purchases 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. Onoff Numbers sells 9 in-app purchases, starting at $7.99 per month and SIPHER sells 6 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SIPHER holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Onoff Numbers has 793 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 44% of Onoff Numbers's written reviews are positive against 75% of SIPHER's.

UpkeepUpdate frequency

Onoff Numbers ships an update fortnightly, SIPHER every 2 weeks. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
Onoff Numbers versus SIPHER: the parameters behind the verdict, then further details
ParameterOnoff NumbersSIPHER
PriceFreeFree
Rating4.6 (793 ratings)5.0 (7 ratings) — better
Positive reviews43.8% of reviews75.0% of reviews — better
Number of ratings793 — better7
Update frequencyFortnightlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better16.4
Further details — not scored
Size319 MB89 MB
Age rating4+12+
DeveloperONOFFAPPYM Labs (FZC)

Customer experience

Onoff Numbers

All ratings790 ratings
Positive90.3%
Neutral1.5%
Negative8.2%
Written reviews322 reviews
Positive43.8%
Neutral6.2%
Negative50.0%

SIPHER

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Bugs and requests

Onoff Numbers

Reported bugs

4 issues
  • Calls and texts not going through
  • Account validation issues
  • Frequent app crashes
  • Syncing problems with contacts

Requested features

4 requests
  • Add more country support
  • Improve call and SMS reliability
  • Introduce VoIP calling
  • Offer better customer support

SIPHER

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Onoff Numbers

Subscriptions4
  • Onoff Premium7 Days trial$7.991 Month
  • 1 month$10.991 Month
  • 1 month$17.991 Month
Show 1 more
  • 1 month$21.491 Month
One-time5
  • 100 credits$1.99
  • 1000 credits$9.99
  • 1 month$10.99
Show 2 more
  • 1 month$12.99
  • 1 month2 variants$17.99
6 purchases

SIPHER

Subscriptions6
  • Sipher Weekly$5.997 Days
  • Sipher Premium Weekly$6.997 Days
  • Sipher Yearly Offer$29.991 Year
Show 3 more
  • Sipher Yearly Trial3 Days trial$29.991 Year
  • Sipher Premium Yearly$69.991 Year
  • Sipher Yearly$99.991 Year

Questions

Is Onoff Numbers free?
Onoff Numbers is free to download, with in-app purchases available.
Is SIPHER free?
SIPHER is free to download, with in-app purchases available.
Which has better reviews, Onoff Numbers or SIPHER?
SIPHER is rated higher. Onoff Numbers averages 4.6 out of 5 from 793 ratings, while SIPHER averages 5.0 from 7 ratings.
Do Onoff Numbers or SIPHER have ads?
Neither Onoff Numbers nor SIPHER shows ads.
Which is updated more often, Onoff Numbers or SIPHER?
Onoff Numbers ships an update fortnightly, and SIPHER every 2 weeks. Most recently, Onoff Numbers was updated on November 1, 2026 and SIPHER on November 4, 2026.

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