Comparison

Sonar Islands vs Zero Hour Assault

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

Head to head
About

Sonar Islands

Embark on an audio-driven multiplayer adventure across 14 unique islands. Build your empire, explore diverse environments from ancient temples to volcanic landscapes, and engage in various challenges. Full game access requires a subscription.

Highlights
  • Multiplayer online gameplay
  • Audio-driven events
  • Empire building
  • Island exploration and development
  • Diverse island themes
  • Tutorial and story modes
Read full description

Sonar Islands is a MULTIPLAYER ONLINE game, where all relevant events happen in your ears. Build up your empire, explore and develop 14 different islands with this award winning GAME OF THE DAY 2021. Visit an ancient TEMPLE, the ancestors built, where snakes are biting. Take a trip to the JUNGLE, watch abandoned lions on your way Have a merry-go-round on the FUN FAIR and shoot all toys Feel the terraforming heat of the VOLCANO island Short-circuit their brain of the robots from Feer in the MACHINE HALL Get lost in the labyrinth of the PING Island Deal with wind and mosquitos high up on the TREETOP Face the invisible power o ELECTRO. Dance on a ViNYL Record and collect treasures hold by little creatures, Fear the zombies on the GRAVEYARD, Skate on a WINTER LAKE, Visit the monks in their MONASTERY, climb up to HIMALAYA Or decide between HEAVEN or HELL Happy vacation on the islands! Sonar Islands comes with a tutorial, a training island and a story island. To get full access to the game, Sonar Islands offers a monthly and a yearly subscription. When you purchase a subscription, payments will be charged to your App Store account at the confirmation of purchase and will automatically renew unless canceled within 24-hours before the end of the current period. For more information, see our Terms of Use (https://www.mentalhome.eu/terms-of-use/) and our Privacy Policy (https://www.mentalhome.eu/privacy-policy/).

About

Zero Hour Assault

An audio-only first-person shooter designed for blind and visually impaired players. Experience intense online combat, diverse game modes, and tactical gameplay entirely through sound. Features include a persistent open-world PvP map, base building, and an extensive arsenal of weapons and gadgets.

Highlights
  • Audio-only gameplay
  • Diverse game modes (Battle Royale, Zombie Survival, Knife Fight)
  • Persistent open-world PvP
  • Base building and defense
  • Tactical combat mechanics
  • Extensive arsenal and gadgets
  • Integrated voice chat
Features
Read full description

IMPORTANT: THIS IS AN AUDIOGAME Zero Hour Assault is played entirely by sound and is designed for the blind and visually impaired community. Everything is spoken by the game's own voice or through VoiceOver, so you never need to look at the screen. It works with VoiceOver on or off; with VoiceOver on, your gestures go straight to the game. The screen shows menus and messages in large text, and during play the gestures that work at that moment as a map of the screen, your map, your hands and the last spoken message. Please put on headphones for the best experience. Dive into intense, non-stop combat in Zero Hour Assault, an online first-person shooter where strategy, skill and teamwork are the keys to survival, whether you hunt alone or with your team. Fight on your terms: drop into a battle royale where the safe zone keeps shrinking, plant or defuse the spike in Search and Destroy, survive zombie hordes with your team, or prove yourself in duels with only snipers, swords or your bare fists. Key Features: 22 Match Modes: Nine new modes (Battle Royale, Search and Destroy, Team Deathmatch, Kill Confirmed, Hardpoint, Gun Game, Infected, Blackout and Squad Rounds), where everyone gets the same equipment, plus thirteen classic modes such as Capture the Flag, Zombie Survival and Knife Fight. Bots can fill empty seats in most modes. Freedom Fight in Brackenford: Parachute into Brackenford, an open city where the fight never stops. Enter about 60 buildings, climb stairs to the roofs, shatter windows, loot chests, and race for airdrops, control points and helicopter extractions while red zones push you around the map. Build and Defend Your Base: Form a group with friends, get a walled base on the freedom fight map, store loot in its chests, and defend your turf from rival players. If all the bases of your group are destroyed, your group is gone forever! Deep Tactical Gameplay: Aim up and down, land headshots and leg shots, carry a weapon in each hand, fit a silencer, and use a weapon melee attack to disarm and down your foes. Walls stop every bullet. In freedom fight and several modes a fallen fighter is knocked down instead of killed, and friends or teammates can lift them back up before they bleed out. Extensive Arsenal & Gadgets: Rifles, shotguns, pistols, sniper rifles, knives, swords and explosives, plus motors and bikes. Become invisible with the Invisibility Shield, lay traps with TM62 mines, create cover with deployable Barricades, or track your enemies with the Spatial Amplifier. Fair Progression & Rewards: Earn zero tokens by playing and spend them in the store. Every character has the same health, speed and damage; your character is your voice and identity. Climb the rankings and the season pass, unlock titles and cosmetics, complete missions and daily events, and spend event points in the event store. Free to Play: Optional in-app purchases offer zero token packs, a paid account, character voices, cosmetics and other extras. A paid account adds comfort and cosmetics, never combat power. All purchases are made inside the app. Integrated Voice Chat: Coordinate with your team using positional audio to hear nearby allies, or use community voice chat to talk with your whole community across the game, regardless of distance. Your Language: Play in English, Arabic, Spanish, Portuguese or Turkish, with more languages translated by players. Chat has 27 language channels and can translate messages. Made for Touch: On iPhone and iPad you play with touch gestures, and "View touch screen gestures" in the main menu explains every one. iPhone and iPad use the mobile server, built for touch play. Windows players have a separate server on purpose, to keep the game fair for touch players; choose it with "choose server" in the main menu if you want to face them. The battlefield is calling. Gear up, pick your character, and prove your worth. Are you ready for Zero Hour Assault?

Screenshots

Sonar Islands4 screens
Zero Hour Assault1 screens

Verdict

The call

The clearest difference is monetization model: Zero Hour Assault at free against Sonar Islands's subscription. Zero Hour Assault also leads on rating (4.0 vs 3.5) and review sentiment (86% vs 60%). Sonar Islands's advantage is ratings volume (83 vs 10) and iOS requirement (12.5 vs 16.0). On price, ads, in-app purchases 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. Sonar Islands sells 5 in-app purchases, starting at $2.99 per month and Zero Hour Assault sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Zero Hour Assault holds the better App Store score, 4.0 against 3.5. That said, the two scores are not equally well evidenced: Sonar Islands has 83 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 60% of Sonar Islands's written reviews are positive against 86% of Zero Hour Assault's.

UpkeepUpdate frequency

Sonar Islands ships an update every 2 months, Zero Hour Assault every 3 weeks. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

Scorecard6 real differences · 4 level
Sonar Islands versus Zero Hour Assault: the parameters behind the verdict, then further details
ParameterSonar IslandsZero Hour Assault
PriceFreeFree
Rating3.5 (83 ratings)4.0 (10 ratings) — better
Positive reviews60.1% of reviews85.7% of reviews — better
Number of ratings83 — better10
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.5 — better16.0
Further details — not scored
Size288 MB220 MB
Age rating12+17+
DeveloperHansjoerg MikeschNBM DIGITAL LTD

Customer experience

Sonar Islands

All ratings83 ratings
Positive56.6%
Neutral13.3%
Negative30.1%
Written reviews143 reviews
Positive60.1%
Neutral10.5%
Negative29.4%

Zero Hour Assault

All ratings10 ratings
Positive70.0%
Neutral10.0%
Negative20.0%
Written reviews7 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

Bugs and requests

Sonar Islands

Reported bugs

4 issues
  • Crashes and freezes on certain devices
  • Compass and navigation issues with iOS 16
  • Incorrect Morse code in tutorial
  • Inconsistent audio cues

Requested features

5 requests
  • Additional free islands to explore
  • Option to purchase game outright instead of subscription
  • More varied event types and challenges
  • Ability to customize islands
  • Support for multiple languages

Zero Hour Assault

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Sonar Islands

Subscriptions2
  • Full Access - monthly$2.991 Month
  • Full Access - yearly$29.491 Year
One-time3
  • 100 Diamonds$0.99
  • 500 Diamonds$3.99
  • 1000 Diamonds$5.99
10 purchases

Zero Hour Assault

One-time10
  • backpacks level3$3.99
  • KelTecP318$6.99
  • platinum token pack$12.99
Show 7 more
  • paid account 1 month$14.99
  • hex$24.99
  • supreme$24.99
  • paid account 3 month$44.95
  • lord$59.99
  • paid account 6 month$89.90
  • paid account 12 month$179.00

Questions

Is Sonar Islands free?
Sonar Islands is free to download, with in-app purchases available.
Is Zero Hour Assault free?
Zero Hour Assault is free to download, with in-app purchases available.
Which has better reviews, Sonar Islands or Zero Hour Assault?
Zero Hour Assault is rated higher. Sonar Islands averages 3.5 out of 5 from 83 ratings, while Zero Hour Assault averages 4.0 from 10 ratings.
Do Sonar Islands or Zero Hour Assault have ads?
Neither Sonar Islands nor Zero Hour Assault shows ads.
Which is updated more often, Sonar Islands or Zero Hour Assault?
Sonar Islands ships an update every 2 months, and Zero Hour Assault every 3 weeks. Most recently, Sonar Islands was updated on October 22, 2026 and Zero Hour Assault on October 20, 2026.

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