Comparison

One in a Trillion vs Grimoire Incremental

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

Head to head
About

One in a Trillion

This is an odds-based tapper game where players collect unique eggs with varying rarities. You can build custom cards, compete with friends, and join a community to discover rare items. It offers long-term collection goals and casual competitive gameplay.

Highlights
  • Collect eggs with insane rarities
  • Create unique Glyphcards
  • Compete in daily leagues and team battles
  • Progress through egg incubators and luck enhancements
  • Scavenger Hunt eggs with community clues
  • Semi-offline play
Features
Read full description

One in a Trillion: The Ultimate Collection Game! An odds based tapper game where you compete with friends and the community to hunt rare eggs that range in rarity of 1 in 250 taps, all the way up to the insane 1 in 1,000,000,000,000! Dive into possibly the world’s biggest mobile collection game! Collect eggs with insane rarities, yolk them & build completely unique cards for your collection! Can You Beat the Odds? Ready… Eggy… Go! - No ads, not a single one! - Solo dev passion project with constant updates—your feedback is always welcome! - Simple core gameplay: drag your finger to collect eggs, gems, boosts, and more. - The biggest long-term collection game imaginable. - Over 235+ creatively designed eggs to collect in multiple ways, with more being added regularly. - Complete each egg by collecting it in 5 different ways, including creating Glyphcards. - Glyphcards are a hard earned process to create a totally unique card for an egg, share it with the community & strive for the best collection possible. - Egg rarity ranges from 1 in 250 to 1 in a trillion—pray to the RNG gods or focus on progression! - Progress and enhance your ability to find the rarest eggs through egg incubators & increasing luck sauce base and costs. - Collect special yolks to rest those hands and Instant Play. - Daily rewards, egg boost slots, leagues & prizes every 4 hours. - Optional competitive gameplay includes team battles, daily leagues, player rankings, prizes, and more. - Use Tripply’s & Dubbly Jubbly’s to accumulate insane multiplayer scores - Scavenger Hunt eggs: use clues and chat with the community to discover how to unlock them. - Join our friendly Discord community! - Enjoy semi-offline play. One in a Trillion is a casual collection game you can play for years. Even if the insanely rare eggs seem hard to collect, you can work on creating Glyphcards and compete against friends in daily leagues for prizes. Experience our unique dragging mechanism in the core gameplay, which is more satisfying than traditional clicking or tapping. Multiplayer seamlessly blends effort and luck for a casual take on competitive play. While this game is not idle, fans of incremental or idle games may find enjoyment here too. SUPPORT: Are you experiencing issues? Email the dev at help@hamlab.dev for further help. Alternatively, join our Discord.

About

Grimoire Incremental

Engage in a narrative-driven idle or clicker game where your choices shape society and unlock new mechanics. Progress through runs and prestiges with non-formulaic gameplay and optional ads.

Highlights
  • Non-formulaic gameplay
  • Branching narrative choices
  • Idle and clicker mechanics
  • Unlockable mechanics
  • Opt-in ads for bonuses
  • Single in-app purchase option
Features
Read full description

NON-FORMULAIC GAMEPLAY Make real choices through spells to favour, interactions with the populace, and other arcane projects. Focus on combining thematic effects to wield great power. Choose between idle and clicker mechanics as you progress through runs and prestiges. BRANCHING CHOICES Choose how you'll use the magic available to you to shape society, and witness the impact through a changing story and play style. COMPELLING NARRATIVE Experience a broad story arc that grows as you progress, and branches with the choices you make and actions you take. MANY AND VARIED MECHANICS Unlock new ways to make those numbers bigger with practice, research, spells, creations, lifestyle and expeditions. Each new mechanic offers a different twist and provides new opportunities for strategy. NO OBLIGATION Adverts are opt-in for a bonus only. No content is blocked behind ad walls. Single in-app purchase removes ad button and gives boost forever.

Screenshots

One in a Trillion4 screens
Grimoire Incremental4 screens

Verdict

The call

The clearest difference is ads: One in a Trillion at none against Grimoire Incremental's shown. One in a Trillion also leads on update cadence (every 11 days vs every 3 months). On price, rating, review sentiment and ratings volume 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. One in a Trillion sells 17 one-off in-app purchases and Grimoire Incremental sells 1 one-off in-app purchase. 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 — 4.7 for One in a Trillion against 4.8 for Grimoire Incremental. Both are backed by a comparable volume of ratings — 1.2K and 544 respectively. Written reviews split almost evenly too, at 86% and 87% positive.

UpkeepUpdate frequency

One in a Trillion ships an update every 11 days, Grimoire Incremental every 3 months. The most recent releases landed on September 22, 2026 and September 19, 2026 respectively.

Scorecard2 real differences · 8 level
One in a Trillion versus Grimoire Incremental: the parameters behind the verdict, then further details
ParameterOne in a TrillionGrimoire Incremental
PriceFreeFree
Rating4.7 (1.2K ratings)4.8 (544 ratings) — better
Positive reviews86.0% of reviews86.9% of reviews — better
Number of ratings1.2K — better544
Update frequencyEvery 11 days — betterEvery 3 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size78 MB70 MB
Age rating4+9+
DeveloperHamlab ABGraham Goldstein

Customer experience

One in a Trillion

All ratings1,171 ratings
Positive92.9%
Neutral2.0%
Negative5.1%
Written reviews214 reviews
Positive86.0%
Neutral6.1%
Negative7.9%

Grimoire Incremental

All ratings544 ratings
Positive96.0%
Neutral1.5%
Negative2.6%
Written reviews107 reviews
Positive86.9%
Neutral5.6%
Negative7.5%

User reviews

One in a Trillion

From 1.2K App Store ratings

What we love

  • 🚀 Addictive gameplay
  • 👍 No ads
  • 🚀 Constantly updated
  • 👍 Helpful and friendly community
  • 🚀 Unique and engaging concept

Room to improve

  • 🐛 Occasional bugs and glitches
  • 💡 Difficulty progressing without spending money
  • 🐛 Unresponsive controls at times
  • 💡 Lack of offline/idle progression

Grimoire Incremental

From 544 App Store ratings

What we love

  • 🚀 Great game
  • 👍 Simplicity and minimalism
  • 👍 Non-intrusive ads
  • 👍 Engaging gameplay
  • 👍 Rewarding progression

Room to improve

  • 🐛 Occasional crashes
  • 🐛 Slow progress in late game
  • 🐛 Imbalanced builds
  • 🐛 Lack of content variety

Bugs and requests

One in a Trillion

Reported bugs

3 issues
  • Inability to log in and sync progress across devices
  • Saved progress being lost after updates
  • Certain mini-games not functioning properly

Requested features

4 requests
  • Ability to trade eggs with friends
  • More mini-games and ways to earn resources
  • Offline/idle progression mechanics
  • Customization options for player profiles

Grimoire Incremental

Reported bugs

2 issues
  • Progress loss on crash
  • Compatibility issues on older devices

Requested features

4 requests
  • More content and updates
  • Better late-game balance
  • Detailed progression tracking
  • Story expansion

In-app purchases

17 purchases

One in a Trillion

One-time17
  • 20 Yellow gems$1.99
  • Add yolk slot$1.99
  • 20 yellows gems + 10k blues$1.99
Show 14 more
  • 20 yellows gems + 4k reds$1.99
  • 20 Yellow gems + special offer2 variants$1.99
  • Add yolk slot$2.99
  • Clones Pack$2.99
  • Space Pack$2.99
  • Lomond Pack$2.99
  • 50 Yellow gems$3.99
  • Add yolk slot$3.99
  • 30 Yellow Gems$4.99
  • Add yolk slot$4.99
  • 100 Yellow gems$6.99
  • 150 Yellow gems$9.99
  • 250 Yellow gems$14.99
  • 500 Yellow gems$24.99
1 purchases

Grimoire Incremental

One-time1
  • Remove Advertisements$6.99

Questions

Is One in a Trillion free?
One in a Trillion is free to download, with in-app purchases available.
Is Grimoire Incremental free?
Grimoire Incremental is free to download, with in-app purchases available.
Which has better reviews, One in a Trillion or Grimoire Incremental?
Grimoire Incremental is rated higher. One in a Trillion averages 4.7 out of 5 from 1.2K ratings, while Grimoire Incremental averages 4.8 from 544 ratings.
Do One in a Trillion or Grimoire Incremental have ads?
Grimoire Incremental shows ads; One in a Trillion does not.
Which is updated more often, One in a Trillion or Grimoire Incremental?
One in a Trillion ships an update every 11 days, and Grimoire Incremental every 3 months. Most recently, One in a Trillion was updated on September 22, 2026 and Grimoire Incremental on September 19, 2026.

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