Comparison

Auto Arena 3D vs ECHO LEGION

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

Head to head
About

Auto Arena 3D

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Build your team and set out on an endless expedition. Auto Arena 3D is a single-player 3D auto battler where you recruit and position units to create your own expedition party. Plan before combat, then watch your units fight with their own attacks and skills. BUILD A TEAM THAT CHANGES THE BATTLE Reroll the shop to recruit the units you want. Combine traits and equipment, merge matching units to raise their star level, and discover new team combinations with hero augments. UNCOVER THE SECRETS OF A KINGDOM IN PERIL Explore eight regions, from a royal banquet hall to a frozen throne. Discover distinct battlefields, face powerful bosses, and follow the story through dialogue and comics. VENTURE DEEPER INTO ENDLESS EXPEDITIONS Challenge stronger enemies as you descend into the depths. Manage fatigue, rotate your team, and use the Memory Shards you earn to prepare for your next expedition. COMMAND AT YOUR FINGERTIPS Drag units into position and give them equipment. Press and hold a unit to inspect its stats and skills. Supports Korean, English, and Japanese. Progress is stored on your device. User accounts and cross-device cloud synchronization are not available. Support: alsgudrla799@gmail.com AI USE Some illustrations and music were created using generative AI. AI tools also assisted development. The game includes pre-made images and audio; it does not generate AI content during play.

About

ECHO LEGION

Build your own legion by recruiting defeated enemies as allies. Master strategic formations and unit placement to overcome stronger opponents. Develop your units and unlock new abilities to tackle various challenges.

Highlights
  • Recruit defeated enemies as allies
  • Strategic formation and unit placement
  • Develop and combine units
  • Unlock new abilities and playstyles
  • Cosmetic purchases only, no gacha
Features
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倒した強敵の「残響」を従え、自分だけの軍団を築く。 ECHO LEGION は、編成と陣形で格上を倒す軍団構築バトルです。 ■ 倒した敵が、仲間になる 勝った相手は「残響」となって軍団に加わります。ゴブリンの王も、森の巨木も。集めた残響を育て、組み合わせ、あなただけの軍団をつくりましょう。 ■ 格上を、配置で倒す 戦力差をひっくり返すのは編成と陣形。前衛・後衛の置き方、主人公の位置、残響同士の相性で、戦いの結果は大きく変わります。格上に勝った倍率は「UNDERDOG」の記録として残ります。 ■ 育つほど、選択肢が広がる 共鳴コアで能力を習得し、キーストーンで戦い方そのものを変える。ステージ、試練、シーズンの裂け目と、挑む場所はいくつもあります。 ■ 強さは、売らない 課金はカードの装い(見た目)と、遊びやすさを助ける機能だけ。ガチャはありません。勝敗はあなたの軍団で決まります。 ※ 基本プレイ無料・アプリ内課金あり ※ Google / Apple アカウントと連携すると、進行をクラウドに保存できます ■ 月額メンバーシップ「盟約」について ・月額 500円(自動更新)。期間終了の24時間前までに解約しない限り自動で更新されます ・解約は iPhone の「設定」→ Apple ID →「サブスクリプション」からいつでも行えます ・利用規約:https://echo-legion.com/legal/terms ・プライバシーポリシー:https://echo-legion.com/legal/privacy

Screenshots

Auto Arena 3D4 screens
ECHO LEGION4 screens

Verdict

The call

The clearest difference is in-app purchases: Auto Arena 3D at none against ECHO LEGION's 10. ECHO LEGION's advantage is update cadence (every 2 days vs weekly) and device support (3 vs 1). On price and ads 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. ECHO LEGION sells 10 in-app purchases, starting at $2.99 per month. Auto Arena 3D asks for nothing beyond the download.

UpkeepUpdate frequency

Auto Arena 3D ships an update weekly, ECHO LEGION every 2 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Auto Arena 3D versus ECHO LEGION: the parameters behind the verdict, then further details
ParameterAuto Arena 3DECHO LEGION
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—1 — better
Update frequencyWeeklyEvery 2 days — better
AdsYesYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size339 MB104 MB
Age rating12+12+
Developerminhyung kimTatsuya Maeda

In-app purchases

None

Auto Arena 3D

No in-app purchases

10 purchases

ECHO LEGION

Subscriptions1
  • 盟約(月額)$2.991 Month
One-time9
  • おかえりパック$2.99
  • 覇者を越えたパック$2.99
  • ECHO PASS 凍てつく残響$5.99
Show 6 more
  • PASS+ へのアップグレード ・ はじまりの共鳴$9.99
  • PASS+ へのアップグレード ・ 凍てつく残響$9.99
  • 結晶 ×1,680$11.99
  • ECHO PASS+ 凍てつく残響$14.99
  • 結晶 ×2,550$19.99
  • 結晶 ×9,600$59.99

Questions

Is Auto Arena 3D free?
Auto Arena 3D is free to download, with no in-app purchases.
Is ECHO LEGION free?
ECHO LEGION is free to download, with in-app purchases available.
Do Auto Arena 3D or ECHO LEGION have ads?
Both Auto Arena 3D and ECHO LEGION show ads.
Which is updated more often, Auto Arena 3D or ECHO LEGION?
Auto Arena 3D ships an update weekly, and ECHO LEGION every 2 days. Most recently, Auto Arena 3D was updated on October 29, 2026 and ECHO LEGION on October 31, 2026.

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