Comparison

Void Reaper vs Alien Observer

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

Head to head
About

Void Reaper

This casual idle RPG offers immediate action with auto-progression and offline rewards. Engage in an epic story of love, betrayal, and redemption as you descend into Hell to rescue your Princess, making dark choices along the way.

Highlights
  • Auto-progression and offline rewards
  • AFK and player-controlled combat
  • Crafting and forging demon relics
  • Impactful upgrades and talents
  • Bounties, contracts, and boss hunts
  • Interdimensional travel and corrupted worlds
  • Captivating epic story
Features
Read full description

VOID REAPER is your first casual idle RPG — built for action first. STRAIGHT INTO ACTION Jump in whenever you want to: auto-progression, offline rewards and fights feel instantly good. Less tapping through upgrade screens. More slashes, shots, and satisfying kills. TRIUMPH AND TRAGEDY Make history in this epic tale of love, betrayal, retribution and redemption. Descend into Hell to bring your Princess back. A desperate Hero. A silent Void. A tempting deal with the Devil. Lose a piece of humanity — and gain something darker in return in this battle between good and evil. But who's really good? BEST OF BOTH WORLDS Void Reaper delivers the best of the genre: • AFK and player-controlled combat • Crafting & forging: turn demon relics into evolving gear • Upgrades & talents: impactful builds, fast decisions, demonic powers • Missions: bounties, contracts, and boss hunts • Interdimensional travel: rifts, realms, and corrupted worlds • Captivating story: an epic tale unfolds as you progress

About

Alien Observer

Features
Read full description

Your Home world is slowly dying. You are a young alien Observer Corps agent on your first deep assignment, sent to study a remarkably promising third planet the locals call Earth. Plot your orbits, scan, learn, and try to stay invisible. WHAT YOU DO Design transfer orbits and time your burns in an original orbital mechanic. Scan biomes, cities and oceans through alien eyes. Solve mini-games to calibrate sensors and stabilize anomalies. Make strategic calls. Manage antimatter, intel and samples. Upgrade your ship. Level up your Observer. Climb the Council ranks. File reports. Honor the Prime Directive: remain unseen. A blend of orbital strategy, RPG progression and resource management, with a healthy dose of dry humor about a bureaucratic alien civilization trying very hard to understand us. SUBSCRIPTION Annual Season Pass is an auto-renewable subscription, 1 year duration. Price is shown on the purchase screen before you confirm, in your local currency. The Season Pass unlocks Advanced Autopilot, two Data Storage licenses, the Chapter 2 expansion, the Generalist class, the Pets Pack with all four companions, and every DLC released during the year. All unlocked content is yours to keep permanently, even after the subscription ends. IN-APP PURCHASES Alien Observer is free to play. Optional one-time purchases include antimatter reactor refills, the Data Storage License, Advanced Autopilot, the Chapter 2 expansion, and animal companions (Laika, Ham, Cow, HAL9000), available individually or as a Pets Pack. These purchases never expire. ADS Optional rewarded video ads can be watched to earn small in-game rewards (a unit of antimatter, a skill point, raw data, or a reduction in Notoriety). Ads are never required to progress. The Annual Season Pass does not remove ads, since ad rewards remain useful regardless of subscription status — but Season Pass benefits make them far less necessary. TERMS AND PRIVACY Terms of Use (EULA): https://alienobserver.app/terms Privacy Policy: https://alienobserver.app/privacy Website: https://alienobserver.app

Screenshots

Void Reaper4 screens
Alien Observer4 screens

Verdict

The call

The clearest difference is iOS requirement: Void Reaper at 13.0 against Alien Observer's 17.6. 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. Void Reaper sells 14 one-off in-app purchases and Alien Observer sells 10 in-app purchases, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Void Reaper ships an update every 2 weeks, Alien Observer every 3 weeks. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

Scorecard1 real difference · 9 level
Void Reaper versus Alien Observer: the parameters behind the verdict, then further details
ParameterVoid ReaperAlien Observer
PriceFreeFree
Rating4.7 (75 ratings) — better—
Positive reviews35.0% of reviews—
Number of ratings75 — better—
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.6
Further details — not scored
Size473 MB640 MB
Age rating9++12
DeveloperKarate GorillaSolebo LTD

In-app purchases

14 purchases

Void Reaper

One-time14
  • Pinch of Gems$0.49
  • Start Bundle 3$2.99
  • Handful of Gems$2.99
Show 11 more
  • Doomhollow resources$2.99
  • All Resources$4.99
  • Infinite Dash$4.99
  • Cyber resources$4.99
  • Gloamwood resources$4.99
  • Demon Pack$5.99
  • Skip All Videos$8.99
  • Purse of Gems$9.99
  • Auto Kill Fly$9.99
  • Chest of Gems$24.99
  • Vault of Gems$99.99
10 purchases

Alien Observer

Subscriptions1
  • Annual Season Pass$29.991 Year
One-time9
  • Full Reactor Refill$1.99
  • Data Storage License$1.99
  • Pet: Laika$3.99
Show 6 more
  • DLC Pet: Ham$3.99
  • Pet: Cow$3.99
  • Pet: HAL9000$3.99
  • Advanced Autopilot$4.99
  • DLC Pets Pack$9.99
  • Chapter 2 License$19.99

Questions

Is Void Reaper free?
Void Reaper is free to download, with in-app purchases available.
Is Alien Observer free?
Alien Observer is free to download, with in-app purchases available.
Do Void Reaper or Alien Observer have ads?
Both Void Reaper and Alien Observer show ads.
Which is updated more often, Void Reaper or Alien Observer?
Void Reaper ships an update every 2 weeks, and Alien Observer every 3 weeks. Most recently, Void Reaper was updated on October 14, 2026 and Alien Observer on October 9, 2026.

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