Comparison

Spikko vs String

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

Head to head
About

Spikko

This app provides virtual cellular phone numbers for your mobile device, allowing you to manage multiple local and international numbers. It offers privacy by controlling your displayed identity and separating personal and business communications on a single SIM. The service works over standard cellular networks, not VoIP, ensuring quality and ease of use.

Highlights
  • Virtual phone numbers
  • Global country coverage
  • Caller ID control
  • SMS support
  • Scheduled number activation
  • Privacy protection
Read full description

The Spikko cellular virtual phone numbers app is the client for the Spikko solution. You must have a paid Spikko account in order to use it. Spikko provides you with additional numbers on your cell phone – local, and in 52 other countries. Spikko enables you to receive cellular calls on those numbers, and control your displayed identity by selecting any one of those numbers for outgoing calls. Your privacy is protected, and you can select dedicated phone numbers for calls, SMS, etc. Spikko does not keep your phonebook, makes it public or searchable, or infringe on your privacy in any way. No need to carry two handsets. You can restrict the hours and days that those additional numbers are active. All additional numbers can be active at the same time according to a pre-defined schedule, as opposed to dual SIMs solutions. For a small / home office, working with customers around the globe or just looking for increased privacy - you need the Spikko solution - at home or when roaming*, to make sure you can use the number you need for your purpose. Get extra numbers you may need on the same handset, with low-cost incoming/outgoing calls, and don’t compromise on quality or privacy. Spikko technology works over standard cellular networks and is not based on VOIP connections. You can cancel at any time. The need to carry multiple devices, purchasing costly dual SIM devices, typing annoying access codes, or paying outrageous rates for international calls – is now removed. How does it work? -Make sure you have an active Spikko account -Install the app and login -Approve permissions -Just dial Get an overseas phone number and your customers will think you are just around the block! What Else? -Manage as many numbers as you want, simultaneously. -Want to cancel? Sure, no strings attached or contract required. -Get rates information and top up more credit for calling directly through the app. Easy! Why Spikko? -Working with global customers? Get a number that matches their area code. -Living abroad? -Traveling? Use Spikko to enjoy low-cost rates for calls*, ** Bits and Bytes: -Multiple numbers-there’s no cap on how many numbers you can own. -Get full control over your caller IDs. -No internet connection required to make calls (Just for configuration). -SMS is supported in some locations The Spikko edge over other types of solutions: -Private and Business life complete separation – using one SIM. -Superb voice quality – A network-based solution (not VOIP) -Operator and network-agnostic. -Ideal for personal as well as business use. See Spikko.com for countries where Spikko is supported * Spikko App requires internet connection for outgoing calls in some countries where local access numbers is not available yet ** NOTE - even if you have a local number from Spikko on your cellphone when roaming, call prices are not tariffed as local calls, due to the surcharge required for the Spikko service entry point location. You should check fares before placing calls. ** NOTE – you must have a subscription with a local operator or the network will not recognize your handset. Although the application is free to install from the AppStore, each monthly subscription requires a monthly payment, the prices vary between $9 and $30 depending on the selected location.All transactions occur on the AppStore with your registered account and payment method. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

About

String

Enhance customer engagement with a business SMS and voice platform. Organize your inbox, automate responses, and manage contacts efficiently. Send personalized messages to individuals or groups, and access your workflow from any device.

Highlights
  • Use existing or new phone numbers
  • Organize inbox with sales funnel view
  • Automated responses and auto-replies
  • Contact management and CRM integrations
  • 1-1, group, and mass messaging
  • Templates and voicemail transcription
  • Browser and mobile app access
Features
Read full description

Boost your brand engagement with String’s intuitive business SMS marketing, text and voice. ANY PHONE NUMBER, EVEN LANDLINES Use your existing mobile or landline number with String. Select a new local number or upgrade to a vanity or toll free number of your choice. ORGANIZE YOUR INBOX Transform your inbox into a sales funnel or kanban board with various viewing, filtering and tagging options — Stay on top of your conversations and never miss a message again. POWERFUL MESSAGE MANAGEMENT Mark Unread and Archive — You love it for your emails, you’ll love it for your texts. STAY RESPONSIVE, 24/7 Amplify your interaction with automations and Auto-Replies — Respond to texts and missed calls on time, every time. TAP INTO ENDLESS POSSIBILITIES Contact Management & Integrations — Save important contact notes directly from the message thread. Capture contacts, import from your phone or computer,, automate workflows, integrate with tools you love (like your CRM, etc). REACH THE MASSES, OR JUST ONE Conversational, Groups or Mass Messaging — Respond directly with 1-1 messaging, message with a group,r or send personalized Mass Messages to multiple people at once, individually. BUILD A LOYAL CUSTOMER BASE Send promos, reminders and confirmations and never miss a lead, client or customer with Elite features like triggered Keyword Responses, and Auto-Replies. SAVE TIME Templates — No more copy-pasting the same message over and over. No time to listen to voicemail? View voicemail transcriptions in your inbox with visual voicemail. USE IT ANYWHERE Browser & Mobile Apps — Increase your workflow efficiency with access to String from your computer and mobile device. CALL FORWARDING & VOICE Separate your personal and professional calls with call forwarding and flexible voice settings. GOT QUESTIONS? Email our stellar support at support@joinstring.com. Find helpful articles, join our customer community and create tickets in our Help Center: https://help.joinstring.com/hc/en-us Terms of Service: https://www.joinstring.com/terms Privacy Policy: https://www.joinstring.com/privacy

Screenshots

Spikko4 screens
String4 screens

Verdict

The call

The clearest difference is review sentiment: String at 69% against Spikko's 29%. String also leads on in-app purchases (none vs 10) and ratings volume (62 vs 7). Spikko's advantage is rating (3.7 vs 3.5) and iOS requirement (9.0 vs 15.0). 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. Spikko sells 10 in-app purchases, starting at $3.99 per month. String asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Spikko holds the better App Store score, 3.7 against 3.5. That said, the two scores are not equally well evidenced: String has 62 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 29% of Spikko's written reviews are positive against 69% of String's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Spikko ships an update every 6 weeks, String every 2 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

Scorecard6 real differences · 4 level
Spikko versus String: the parameters behind the verdict, then further details
ParameterSpikkoString
PriceFreeFree
Rating3.7 (7 ratings) — better3.5 (62 ratings)
Positive reviews28.6% of reviews68.6% of reviews — better
Number of ratings762 — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better15.0
Further details — not scored
Size29 MB68 MB
Age rating4+4+
DeveloperSpikko Telecom LTDNumberBarn, LLC

Customer experience

Spikko

All ratings7 ratings
Positive71.4%
Neutral0.0%
Negative28.6%
Written reviews14 reviews
Positive28.6%
Neutral7.1%
Negative64.3%

String

All ratings62 ratings
Positive64.5%
Neutral1.6%
Negative33.9%
Written reviews35 reviews
Positive68.6%
Neutral2.9%
Negative28.6%

In-app purchases

10 purchases

Spikko

Subscriptions7
  • $4 Spikko Subscription - ID1$3.991 Month
  • $5 Spikko Subscription - ID1$4.991 Month
  • $9 Spikko Subscription - ID1$8.991 Month
Show 4 more
  • $9 Spikko Subscription - ID2$8.991 Month
  • $9 Spikko Subscription - ID3$8.991 Month
  • $15 Spikko Subscription - ID1$14.991 Month
  • $20 Spikko Subscription - ID1$19.991 Month
One-time3
  • $5 Credit$4.99
  • $10 Credit$9.99
  • $20 Credit$19.99
None

String

No in-app purchases

Questions

Is Spikko free?
Spikko is free to download, with in-app purchases available.
Is String free?
String is free to download, with no in-app purchases.
Which has better reviews, Spikko or String?
Spikko is rated higher. Spikko averages 3.7 out of 5 from 7 ratings, while String averages 3.5 from 62 ratings.
Do Spikko or String have ads?
Neither Spikko nor String shows ads.
Which is updated more often, Spikko or String?
Spikko ships an update every 6 weeks, and String every 2 months. Most recently, Spikko was updated on October 24, 2026 and String on October 21, 2026.

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