Comparison

Subnet Plus vs VSP

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

Head to head
About

Subnet Plus

Calculate IP subnets with ease on your iPhone or iPad. This tool helps visualize binary and hex information for subnets, aiding in network studies and professional calculations. Save your calculated networks for future reference.

Highlights
  • Subnet calculation
  • Save calculated networks
  • Binary and hex display
  • Network address ranges
  • Broadcast IP addresses
  • Study aid for networking exams
Features
Read full description

Subnet Plus is a fast, beautiful subnet calculator for network engineers, sysadmins, and students, now completely rebuilt for iPhone and iPad. Type any IPv4 or IPv6 address and instantly see the network address, broadcast, usable host range, subnet mask, wildcard mask, prefix length, total and usable hosts, IP class, and address type. A live prefix stepper lets you dial the mask up or down and watch every value update in real time. NETWORK CALCULATIONS • IPv4 and IPv6, auto-detected • Binary view with network/host bits color-coded • Visual address-space map PRO TOOLS • VLSM Designer: carve a network into right-sized subnets and save the plan • CIDR to subnet mask to wildcard converter • Subnet membership: is an address inside a network? • Range to CIDR, and supernet / aggregate • CIDR cheat sheet NETWORK UTILITIES • DNS Lookup: A, AAAA, MX, NS, TXT, CNAME, SOA, SRV, and reverse PTR, using your device's resolver or any IPv4/IPv6 DNS server you add • Ping: round-trip time and packet loss • Traceroute: see the path to any host • Path Monitor (Pro): a live, MTR-style traceroute with per-hop packet loss and latency • Network Scanner (Pro): find the active devices on your local network, their names, and open ports • Email Auth: check a domain's SPF, DKIM, and DMARC records SIRI, WIDGETS & APPLE INTELLIGENCE • Explain this: turn any subnet calculation or Email Auth report into a plain-English explanation, generated on-device by Apple Intelligence • Siri & Shortcuts: calculate a subnet, ping a host, check a port, or ask "What's my network?" by voice, and use the same actions in your own Shortcuts • Live Activities: follow Path Monitor and Network Scanner from the Lock Screen and Dynamic Island • Home Screen widget: pin any saved subnet, with a different subnet per widget SAVE & SYNC • Label and save subnets, VLSM plans, and lookups • Everything syncs across your devices with iCloud • Share and export your results Available in 45 languages. Remove ads with a one-time in-app purchase.

About

VSP

This VoIP softphone connects to the VSP Platform, requiring an administrator-generated account for login. It allows enterprises and operators to manage softphone settings and configurations. Emergency call functionality is limited and not intended for such use.

Highlights
  • VoIP softphone client
  • VSP Platform integration
  • Administrator account required
  • Enterprise provisioning
  • Softphone settings management
  • Limited emergency call handling
Features
Read full description

VSP for iOS is a VoIP softphone explicitly tied to the VSP Platform and requires an administrator generated to account for login. If you do not have an account given to you by your company, operator, or VSP, you will not be able to use the softphone client. The VSP Platform’s Provisioning Module is a powerful way for enterprises and operators to distribute, configure, and manage VSP softphones and enables users to store their softphone related settings a single, convenient location. With the Provisioning Module, customers can fully provision their VSP softphones for use with their enterprise, SMB, ITSP, or operator VoIP solution. IMPORTANT NOTE: This version of VSP is tied to VSP hosted Provisioning Module and requires an account set up by your operator or enterprise. Without an account, the client will not work. Emergency Calls VSP mobile products provide handling designed to redirect emergency calls to the Native Cellular dialer when possible on a best reasonable commercial effort basis, however, this functionality is also dependent on the operating system of the mobile phone which is outside of our control and subject to change at any time. As a result, the official position of VSP is that the VSP product is not intended, designed, or fit for placing, carrying, or supporting Emergency Calls. VSP will not be liable for any costs or damages arising either directly or indirectly from the use of the software for Emergency Calls. Using VSP as a default dialer may interfere with dialing emergency services. To all of our client. As per directive by Apple's policy. We are informing you that our APP does not collect any classified information in your app or device and we respect each individual data privacy.

Screenshots

Subnet Plus4 screens
VSP4 screens

Verdict

The call

The clearest difference is review sentiment: Subnet Plus at 89% against VSP's 11%. Subnet Plus also leads on rating (4.7 vs 1.2) and update cadence (monthly vs every 3 months). VSP's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, monetization model 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. Subnet Plus sells 1 one-off in-app purchase. VSP asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Subnet Plus holds the better App Store score, 4.7 against 1.2. Both are backed by a comparable volume of ratings — 57 and 18 respectively. Written reviews point the same way: 89% of Subnet Plus's written reviews are positive against 11% of VSP's.

UpkeepUpdate frequency

Subnet Plus ships an update monthly, VSP every 3 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard7 real differences · 3 level
Subnet Plus versus VSP: the parameters behind the verdict, then further details
ParameterSubnet PlusVSP
PriceFreeFree
Rating4.7 (57 ratings) — better1.2 (18 ratings)
Positive reviews89.2% of reviews — better11.1% of reviews
Number of ratings57 — better18
Update frequencyMonthly — betterEvery 3 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.015.0 — better
Further details — not scored
Size18 MB108 MB
Age rating4+4+
DeveloperTed TrentlerVSP Softphone

Customer experience

Subnet Plus

All ratings57 ratings
Positive93.0%
Neutral3.5%
Negative3.5%
Written reviews74 reviews
Positive89.2%
Neutral4.1%
Negative6.8%

VSP

All ratings18 ratings
Positive5.6%
Neutral0.0%
Negative94.4%
Written reviews9 reviews
Positive11.1%
Neutral0.0%
Negative88.9%

Bugs and requests

Subnet Plus

Reported bugs

8 issues
  • Text in subnet netmask field too large, last octet not visible
  • Values truncated, cannot view full values
  • Subnet mask and IP addresses truncated
  • Cannot read all data
  • Numbers truncated on iPhone 5s
Show 3 more
  • Fields populated by app cannot be expanded
  • Screen cannot fit full mask on iPad
  • Calculation for number of subnets may be incorrect

Requested features

5 requests
  • Export option to share saved subnets
  • Pay to remove ads
  • Landscape mode for iPad Pro
  • Update for visualising or adjusting screen on iOS 9
  • Ability to type netmask

VSP

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Subnet Plus

One-time1
  • remove Ads$4.99
None

VSP

No in-app purchases

Questions

Is Subnet Plus free?
Subnet Plus is free to download, with in-app purchases available.
Is VSP free?
VSP is free to download, with no in-app purchases.
Which has better reviews, Subnet Plus or VSP?
Subnet Plus is rated higher. Subnet Plus averages 4.7 out of 5 from 57 ratings, while VSP averages 1.2 from 18 ratings.
Do Subnet Plus or VSP have ads?
Subnet Plus shows ads; VSP does not.
Which is updated more often, Subnet Plus or VSP?
Subnet Plus ships an update monthly, and VSP every 3 months. Most recently, Subnet Plus was updated on November 1, 2026 and VSP on November 2, 2026.

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