Comparison

Jiiya Roll vs Gem Forge

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

Head to head
About

Jiiya Roll

Features
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JiiyaRoll is a casual idle game where you roll dice, collect funds, and hire quirky staff to grow your team. The controls are simple. Roll the dice to collect funds, add staff members, improve efficiency, and keep building your team step by step. As the game progresses, various events may appear. Make choices based on the situation and continue strengthening your team. It is easy to play in short sessions while still offering a steady sense of progress. This app does not include real-money gambling, betting, cash-out, prizes, or wagering.

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) โ€” 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 โ†’ Copper โ†’ Silver โ†’ Gold โ†’ Platinum โ†’ Mithril Stage 2 Common: Garnet โ†’ Amethyst โ†’ Topaz โ†’ Aquamarine โ†’ Opal โ†’ Lapis Stage 3 Premium: Pearl โ†’ Sapphire โ†’ Ruby โ†’ Emerald โ†’ Diamond Stage 4 Ultra Rare: Pink Diamond โ†’ Alexandrite โ†’ Paraiba โ†’ Padparadscha โ†’ Painite โ†’ Star of India Stage 5 Mythic: Fairy Dew โ†’ Elf's Tear โ†’ Dragon Heart โ†’ Phoenix Core โ†’ Tear of God โ†’ 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

Screenshots

Jiiya Roll4 screens
Gem Forge3 screens

Verdict

The call

The clearest difference is price: Gem Forge at Free against Jiiya Roll's $0.39. Gem Forge also leads on iOS requirement (15.0 vs 18.0). Jiiya Roll's advantage is ads (none vs shown). On update cadence, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Gem Forge is free to download; Jiiya Roll costs $0.39 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly daily. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard3 real differences ยท 3 level
Jiiya Roll versus Gem Forge: the parameters behind the verdict, then further details
ParameterJiiya RollGem Forge
Price$0.39Free โ€” better
Update frequencyDailyDaily
AdsNo โ€” betterYes
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS18.015.0 โ€” better
Further details โ€” not scored
Size15 MB129 MB
Age rating4+4+
DeveloperMakoto FukuokaRandomGG, Inc.

In-app purchases

None

Jiiya Roll

No in-app purchases

None

Gem Forge

No in-app purchases

Questions

Is Jiiya Roll free?
Jiiya Roll costs $0.39, with no in-app purchases.
Is Gem Forge free?
Gem Forge is free to download, with no in-app purchases.
Do Jiiya Roll or Gem Forge have ads?
Gem Forge shows ads; Jiiya Roll does not.
Which is updated more often, Jiiya Roll or Gem Forge?
Jiiya Roll ships an update daily, and Gem Forge daily. Most recently, Jiiya Roll was updated on November 6, 2026 and Gem Forge on October 31, 2026.

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