Comparison

UNIVERGE ST500 vs Grandstream Wave

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

Head to head
About

UNIVERGE ST500

This app allows users to make and receive business calls from their mobile devices as if they were at their desk. It integrates with iOS contacts and offers various call management features, simplifying business communications and potentially reducing mobile call costs.

Highlights
  • Make and receive business calls from mobile
  • Integrates with iOS phone contacts
  • Call history grouped by contact
  • Hands-free and Bluetooth headset support
  • Video call capabilities
  • Security and encryption via TLS and SRTP
  • Voicemail access and message waiting indicator
Features
Read full description

Today’s competitive and fast past business environment means that employees are no longer bound to a desk - you need to be mobile and be able to work where your work takes you. NEC’s UNIVERGE ST500 softphones for iPhone allow you to make and receive calls from virtually anywhere, as if you were at your desk. While in the office connect to the Wi-Fi to handle your calls. While outside the office you can use your mobile data (3G / 4G) to handle you calls, and you can reduce incurring mobile call costs (See Notes below). Deploying a ST softphone can save your company money by no longer having employees call-forward their desk phones to their mobile. Staff will also be able to make free internal calls and inexpensive local calls from the softphone rather than all calls being made directly from their mobile phone. By only giving out your desk phone number (not your mobile number), you will always be contactable and you will only have a single call history and work voicemail to check. The ST500 simplifies your communications. [Application features] ・Integration to iOS phone contacts ・Call history (Missed / Incoming / Outgoing) grouped by contact ・Custom star code dial panel for quick dialling ・Hands-free mode ・Bluetooth Headset ・Video call(H.264/AVC) ・Voice codecs: Opus, G.722.1, G.711A/μlaw, G.722, G.729a ・Dial plan ・iOS CallKit support ・iOS PushKit support [Call features] ・Security and encryption via TLS and SRTP ・Make and Answer calls ・Call waiting ・Hold / Retrieve hold ・Transfer ・Call park ・Station hunt groups ・Call pickup ・Dial DTMF (RFC 2833/In-band) ・Call forward – All, Busy, No Answer and Logout ・Voicemail access and Message waiting indicator NOTE: To work outside your corporate Wi-Fi, you will require a VPN connection or a Session Border Controller. THE ST500 is free to use on your NEC Phone systems (SL2100, SV9100, SV9300 or SV9500), but requires an activation code that you can obtain from your NEC representative. It may also requires spare licences capacity on your phone system to create a standard SIP extension.

About

Grandstream Wave

This app transforms your device into a powerful softphone, enabling high-quality audio and video calls, and seamless meeting participation. Connect to your IP PBX system to call extensions, landlines, and mobile numbers from anywhere with a network connection.

Highlights
  • High-quality audio and video calls
  • Schedule and attend meetings
  • Join meetings without logging in
  • Connect to UCM63XX series IP PBX
  • Call extensions, landlines, and mobiles
  • Create and join meetings
Features
Read full description

Wave turns your device into a softphone that can connect, call, and video conference from anywhere by connecting to a Grandstream UCM63XX series IP PBX. It supports key features such as high-quality audio and video calls, scheduling and attending meeting, and allows joining meetings without logging in. As long as there is a network connection, users can register to UCM63XX series extensions, directly call other extensions, landlines, and mobile numbers, as well as create and join meetings. With Wave, users can enjoy calls and meetings no matter where they are, boosting communication efficiency and productivity for your enterprise.

Screenshots

UNIVERGE ST5004 screens
Grandstream Wave4 screens

Verdict

The call

The clearest difference is rating: UNIVERGE ST500 at 3.0 against Grandstream Wave's 2.6. Grandstream Wave's advantage is update cadence (every 5 weeks vs every 3 months) and ratings volume (51 vs 9). On price, review sentiment, 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

UNIVERGE ST500 holds the better App Store score, 3.0 against 2.6. That said, the two scores are not equally well evidenced: Grandstream Wave has 51 ratings behind it against 9, so its average is the more settled of the two. Written reviews split almost evenly too, at 13% and 12% positive.

UpkeepUpdate frequency

UNIVERGE ST500 ships an update every 3 months, Grandstream Wave every 5 weeks. The most recent releases landed on October 20, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
UNIVERGE ST500 versus Grandstream Wave: the parameters behind the verdict, then further details
ParameterUNIVERGE ST500Grandstream Wave
PriceFreeFree
Rating3.0 (9 ratings) — better2.6 (51 ratings)
Positive reviews12.5% of reviews — better12.1% of reviews
Number of ratings951 — better
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size80 MB116 MB
Age rating4+4+
DeveloperNEC CorporationGrandstream

Customer experience

UNIVERGE ST500

All ratings9 ratings
Positive44.4%
Neutral0.0%
Negative55.6%
Written reviews32 reviews
Positive12.5%
Neutral12.5%
Negative75.0%

Grandstream Wave

All ratings51 ratings
Positive33.3%
Neutral7.8%
Negative58.8%
Written reviews107 reviews
Positive12.1%
Neutral9.3%
Negative78.5%

In-app purchases

None

UNIVERGE ST500

No in-app purchases

None

Grandstream Wave

No in-app purchases

Questions

Is UNIVERGE ST500 free?
UNIVERGE ST500 is free to download, with no in-app purchases.
Is Grandstream Wave free?
Grandstream Wave is free to download, with no in-app purchases.
Which has better reviews, UNIVERGE ST500 or Grandstream Wave?
UNIVERGE ST500 is rated higher. UNIVERGE ST500 averages 3.0 out of 5 from 9 ratings, while Grandstream Wave averages 2.6 from 51 ratings.
Do UNIVERGE ST500 or Grandstream Wave have ads?
Neither UNIVERGE ST500 nor Grandstream Wave shows ads.
Which is updated more often, UNIVERGE ST500 or Grandstream Wave?
UNIVERGE ST500 ships an update every 3 months, and Grandstream Wave every 5 weeks. Most recently, UNIVERGE ST500 was updated on October 20, 2026 and Grandstream Wave on October 30, 2026.

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