Comparison

DigDigDrill vs OnceWorld

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

Head to head
About

DigDigDrill

Embark on an underground mining adventure where you dig for minerals and treasures. Use your collected items to craft unique drills with customizable effects. Enjoy a relaxing, no-pressure experience with no enemies or time limits.

Highlights
  • Underground mining and resource collection
  • Craft original drills with a hack-and-slash system
  • Collect various minerals and treasures
  • Forge drills using collected materials
  • Random special drill effects
  • Relaxing gameplay with no enemies or time limits
Features
Read full description

Dig, Dig, and Dig! This game is an underground mining and resource collecting game. Dig freely for minerals and treasures. Use the items you collect to forge your original drills in a hack-and-slash style equipment system. ◆Recommended for◆ *Those who enjoy grinding games. *Those who want to collect many items. *Those who enjoy creating builds in hack-and-slash games. *Those who seek a relaxing game. ◆Game Flow◆ 1: Dig and collect ores and treasure boxes. 2: Sell collected ores to get coins. 3: Use coins and materials to forge new drills. 4: With new equipment, you can dig deeper and faster. ◆Features◆ -Many Materials- There are many minerals underground. You may find special items in gold treasure boxes! -Puzzle Forging- Use the collected minerals to create new drills. You might create the ultimate drill if you fit the ores into the blueprint smartly. -Random Special Effects- Your drill might gain special effects. Combine them effectively to strengthen your power! * Focus on movement speed for carrying resources quickly? * Enhance explosions for massive destruction? The choice is yours! -Zen-like Relaxing Game- No enemies. No time limit. No story. All you have to do is just mine! ◆Credits◆ Sound: Koukaonrabo, Koukaonziten, OtoLogic BGM: Music Atelier Amacha

About

OnceWorld

Experience a nostalgic 2D solo RPG that blends classic MMO charm with modern mobile convenience. Level up, customize your character with stat distribution, enhance gear, collect pets, and battle through a deep progression system.

Highlights
  • Stat distribution for character customization
  • Equipment enhancement and set bonuses
  • Monster capture and pet raising
  • Material collection for crafting and upgrades
  • Reincarnation system for continued growth
  • Abyss Corridor ranked mode
Features
Read full description

OnceWorld is a simple and casual 2D solo-play RPG. Relive the charm of classic MMOs from the good old days — now reimagined for mobile with easy controls and deep progression! Level up, reincarnate, raise pets, awaken equipment, collect materials, and battle in the arena — all in one nostalgic adventure. It’s an RPG that brings the essence of those mid-2000s MMORPGs to your smartphone, blending nostalgia with modern convenience. ▼ Stat Distribution Distribute points into seven basic stats to develop your character. Points are earned as your hero levels up. To reset your distribution, you’ll need a special item. Stat meanings: VIT – Increases HP SPD – Attack speed & number of strikes ATK – Physical attack power INT – Magic attack power & SP capacity DEF – Mainly physical defense power M.DEF – Mainly magical defense power LUK – Evasion & Physical Critical ▼ Weapons & Armor Equip one weapon and five armor pieces. Wearing all five pieces of a matching set grants a set bonus. Use the heart icon at the top-left to toggle your favorite gear display. ▼ Equipment Enhancement Use materials obtained during your adventures to enhance your gear. Each enhancement attempt has a success rate — failure consumes the materials, but the item itself will never break. Some special items can increase success rates. ▼ Accessories Accessories grant special effects when equipped. Defeating enemies while an accessory is equipped will level it up, enhancing its effects over time. ▼ Magic Spend SP to cast powerful spells. Magic attacks cannot be evaded and there are no critical hits. Certain rare materials may further amplify spell power. ▼ Monsters & Pets By carrying a special material, you’ll gain the ability to capture monsters. Captured monsters become pets that grow stronger as they fight alongside you. Some monsters learn skills as they level up. These skills can activate even without being summoned, as long as the monster is accompanying you. Pet switching can only be done at the Pet Keeper in your hometown. Feeding specific materials will raise a pet’s stats. ▼ Monster Encyclopedia Once defeated, monsters are added to the encyclopedia where their stats can be viewed. Captured monsters will display a “Caught” mark. ▼ Materials Materials are divided into three categories: Normal Materials  Used for equipment enhancement and trading. Effect Materials  Provide passive bonuses simply by owning them.  Have a smaller carrying limit. Key Items  Only one can be held.  Cannot be dropped or sold. ▼ Items Items that grant various benefits during adventures. You can assign them to shortcut slots for quick use in the field. Swap registered items using the arrow icon beside the item list. ▼ Reincarnation When your hero reaches the level cap, you can reincarnate. Reincarnation resets your level but increases your level cap and available stat points, allowing for further growth. ▼ Abyss Corridor A ranked mode that can be played a limited number of times per day. Clear each floor by defeating all monsters as fast as possible — faster times rank higher. Treasure chests appear as rewards on each floor. Only Save Slot 1 is eligible for ranking participation. ▼ Arena Watch monster battles. Watch monster battles held several times a day. Choose the strongest team from three teams and watch the battle. Earn Arena Coins if your favorite team wins. Try exchanging them for valuable materials at the Arena Shop. ▼ About the Kin-Slayer Rite ▼ The Kin-Slayer Rite is a ceremony in which the target pet’s kin-bond, level, and accumulated experience are all returned to zero in exchange for enhancing its base stats. A monster that undergoes this rite will gain experience at a slower rate thereafter.

Screenshots

DigDigDrill4 screens
OnceWorld4 screens

Verdict

The call

DigDigDrill and OnceWorld both sit at 4.9 stars, but that hides the real split: 94% of DigDigDrill's written reviews are positive against 59% of OnceWorld's. DigDigDrill also leads on iOS requirement (12.0 vs 15.0). OnceWorld's advantage is update cadence (every 2 days vs monthly). On price, rating, ratings volume 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. DigDigDrill sells 1 one-off in-app purchase and OnceWorld sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for DigDigDrill against 4.9 for OnceWorld. Both are backed by a comparable volume of ratings — 73 and 128 respectively. Written reviews are what separate them: 94% of DigDigDrill's written reviews are positive against 59% of OnceWorld's.

UpkeepUpdate frequency

DigDigDrill ships an update monthly, OnceWorld every 2 days. Both last shipped on September 28, 2026.

Scorecard3 real differences · 7 level
DigDigDrill versus OnceWorld: the parameters behind the verdict, then further details
ParameterDigDigDrillOnceWorld
PriceFreeFree
Rating4.9 (73 ratings)4.9 (128 ratings)
Positive reviews94.4% of reviews — better58.9% of reviews
Number of ratings73128 — better
Update frequencyMonthlyEvery 2 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size139 MB309 MB
Age rating4+12+
DeveloperToki MatsuiPONIX LLC

Customer experience

DigDigDrill

All ratings73 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews36 reviews
Positive94.4%
Neutral5.6%
Negative0.0%

OnceWorld

All ratings128 ratings
Positive96.1%
Neutral3.1%
Negative0.8%
Written reviews73 reviews
Positive58.9%
Neutral9.6%
Negative31.5%

In-app purchases

1 purchases

DigDigDrill

One-time1
  • Remove Ads$2.99
6 purchases

OnceWorld

One-time6
  • Crystals 10$0.99
  • Crystal 50$4.99
  • Crystal 150$14.99
Show 3 more
  • Crystal 300$29.99
  • Crystal 600$59.99
  • Crystal 1000$99.99

Questions

Is DigDigDrill free?
DigDigDrill is free to download, with in-app purchases available.
Is OnceWorld free?
OnceWorld is free to download, with in-app purchases available.
Which has better reviews, DigDigDrill or OnceWorld?
DigDigDrill and OnceWorld are both rated 4.9 out of 5 on the App Store, from 73 and 128 ratings respectively.
Do DigDigDrill or OnceWorld have ads?
Both DigDigDrill and OnceWorld show ads.
Which is updated more often, DigDigDrill or OnceWorld?
DigDigDrill ships an update monthly, and OnceWorld every 2 days. Most recently, DigDigDrill was updated on September 28, 2026 and OnceWorld on September 28, 2026.

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