Comparison

Gem Forge vs Idle Stars

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

Head to head
About

Gem Forge

Features
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Gem Forge: Diamond Enhance Tap, enhance, and forge your way from a humble pebble to the legendary Eternal Diamond! Gameplay - Tap to enhance your gem from Lv.1 to Lv.34 - Risk and reward: higher level = lower success rate but huge profit - Use Protection Charms to save your precious gem from shattering - Collect mystical Charms (Lucky, Crit, Phoenix, Combo + 6 more) — each used once for a single boost - Watch ads for Restore, Boost +50%, or Free Enhance 35-Stage Gem Evolution Tree Stage 1 Ore: Stone → Copper → Silver → Gold → Platinum → Mithril Stage 2 Common: Garnet → Amethyst → Topaz → Aquamarine → Opal → Lapis Stage 3 Premium: Pearl → Sapphire → Ruby → Emerald → Diamond Stage 4 Ultra Rare: Pink Diamond → Alexandrite → Paraiba → Padparadscha → Painite → Star of India Stage 5 Mythic: Fairy Dew → Elf's Tear → Dragon Heart → Phoenix Core → Tear of God → Eternal Diamond Features - 35 unique gem designs with full Indian Mughal jewelry aesthetic - 4 tiers of Protection Charms (Basic / Mid / High / Ultra) - 10 one-time use Charms with unique effects - Codex with 35 collectible gems - Hall of Fame leaderboard - Combo system with bonus rewards - Beautiful Indian jeweler's workshop atmosphere - 8 languages supported Developer: ALIENZ Contact: support@alienz.ooo

About

Idle Stars

Build a star-spanning empire by managing resources, researching technologies, and colonizing new worlds. Engage in diplomacy or conflict with alien civilizations. Reset your universe with permanent upgrades to achieve greater progress each cycle.

Highlights
  • Layered idle economy with five resources
  • Research paths and automation
  • Galaxy map with exploration and colonization
  • Diplomacy and conflict with civilizations
  • Supernova resets with permanent progression
  • Offline progress and notifications
Features
Read full description

Begin with one quiet world and turn it into an empire among the stars. Idle Stars is an incremental strategy game about connected systems. Build solar arrays, mines, laboratories, habitats, and spaceports. Balance five resources, research technologies that change how your economy works, and install AI Directors to automate each world while you are away. When your first planet is no longer enough, launch explorers into a living galaxy. Colonize new worlds, connect them into sectors, and meet civilizations with their own histories and strengths. Open talks, send envoys, or bring the fleet—the choices you make shape the empire and what the galaxy remembers. Eventually, growth reaches its limit. Trigger a supernova, carry stardust and permanent upgrades into a fresh universe, and push farther on every cycle. FEATURES • A layered idle economy built around energy, minerals, science, population, and influence • Research paths and automation that transform how worlds grow • A galaxy map with exploration, travel, colonization, and sectors • Civilizations that can be approached through diplomacy or force • Supernova resets with lasting progression • Offline progress and optional local notifications • Game Center achievements • Optional iCloud document sync between your Apple devices • Universal support for iPhone and iPad • No ads and no subscription The complete game is free. The optional Supporter Pack permanently unlocks three styles for planets, ships, and the app icon. You can also buy one hour of ×2 production: the timer runs in real time, even while the app is closed, and the multiplier never stacks above ×2. The optional Stellar Charter permanently multiplies all production by ×1.5, in every run.

Screenshots

Gem Forge3 screens
Idle Stars4 screens

Verdict

The call

The clearest difference is in-app purchases: Gem Forge at none against Idle Stars's 3. Gem Forge also leads on update cadence (daily vs every 3 weeks) and iOS requirement (15.0 vs 17.0). Idle Stars's advantage is ads (none vs shown). On price 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. Idle Stars sells 3 one-off in-app purchases. Gem Forge asks for nothing beyond the download.

UpkeepUpdate frequency

Gem Forge ships an update daily, Idle Stars every 3 weeks. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Gem Forge versus Idle Stars: the parameters behind the verdict, then further details
ParameterGem ForgeIdle Stars
PriceFreeFree
Rating—4.8 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyDaily — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size129 MB13 MB
Age rating4+9+
DeveloperRandomGG, Inc.PULSAR LLC

In-app purchases

None

Gem Forge

No in-app purchases

3 purchases

Idle Stars

One-time3
  • 1-Hour Boost$1.99
  • Supporter Pack$4.99
  • Stellar Charter$7.99

Questions

Is Gem Forge free?
Gem Forge is free to download, with no in-app purchases.
Is Idle Stars free?
Idle Stars is free to download, with in-app purchases available.
Do Gem Forge or Idle Stars have ads?
Gem Forge shows ads; Idle Stars does not.
Which is updated more often, Gem Forge or Idle Stars?
Gem Forge ships an update daily, and Idle Stars every 3 weeks. Most recently, Gem Forge was updated on October 25, 2026 and Idle Stars on October 31, 2026.

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