Comparison

Spark vs Upload Simulator 2

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

Head to head
About

Spark

Guide the evolution of the cosmos as an ethereal Spark of Life. Assimilate raw materials and influence cosmic development through incremental gameplay. Unlock resources, progress through story elements, and utilize a prestige mechanic for faster advancement.

Highlights
  • Multiple unlockable and upgradeable resources
  • Story elements that unfold with progress
  • Prestige mechanic for accelerated progression
  • Altar of Knowledge for powerful upgrades
  • Intuitive UI with organic learning
  • Optional ads for in-game bonuses
Features
Read full description

Spark is an idle incremental game in which you take on the role of an ethereal Spark of Life that bursts into existence. Assimilate the raw material that exists around you and use your influence to guide the evolution of the Cosmos. Click on the Matter button to begin amassing your influence. When you feel ready, swipe left and begin evolving. Features: - Multiple resources that can be unlocked, purchased, and upgraded - Story elements that appear as player progresses - Prestige mechanic that allows player to start from beginning; progressing faster than before - New "Altar of Knowledge" Mechanic that allows players to spend points gained from the prestige mechanic for new sets of powerful upgrades - Simple, intuitive UI that teaches the game organically as the player progresses - Advertisements are completely optional, and can be watched for an in-game bonus

About

Upload Simulator 2

Simulate the process of uploading data to earn credits, upgrade your hardware, and research new technologies. Discover unique artifacts, craft modules, and customize your operating system with themes and wallpapers.

Highlights
  • GPU mining for credits
  • Upgrade hardware setup
  • Research new technologies
  • Craft modules
  • Customize OS with themes
  • Discover unique artifacts
Features
Read full description

Use your powerful GPU to mine credits and upgrade your setup even further! Get unique upgrades using your hard-gained reputation as an uploader! Use your uploaded data into the laboratory to research amazing new tech and boost your setup even more! Hack into the system and speed up your game with different abilities! Choose the format of your uploads for different outcomes! Find unique artifacts that grant you with different bonus effects! Collect resources to craft modules and modify your system! And customize your OS with different themes or even with the wallpaper of your choice!

Screenshots

Spark4 screens
Upload Simulator 24 screens

Verdict

The call

The clearest difference is price: Spark at Free against Upload Simulator 2's $3.99. Spark also leads on rating (4.8 vs 4.4) and review sentiment (94% vs 80%). Upload Simulator 2's advantage is update cadence (every 2 days vs every 3 weeks). On ads, in-app purchases 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

Spark is free to download; Upload Simulator 2 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Spark holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Spark has 233 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 94% of Spark's written reviews are positive against 80% of Upload Simulator 2's.

UpkeepUpdate frequency

Spark ships an update every 3 weeks, Upload Simulator 2 every 2 days. The most recent releases landed on October 5, 2026 and October 1, 2026 respectively.

Scorecard7 real differences · 3 level
Spark versus Upload Simulator 2: the parameters behind the verdict, then further details
ParameterSparkUpload Simulator 2
PriceFree — better$3.99
Rating4.8 (233 ratings) — better4.4 (18 ratings)
Positive reviews94.3% of reviews — better80.0% of reviews
Number of ratings233 — better18
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better12.0
Further details — not scored
Size75 MB125 MB
Age rating4+4+
DeveloperDeuski Games Limited Liability CompanyEnigmaDev Studios

Customer experience

Spark

All ratings233 ratings
Positive94.8%
Neutral2.6%
Negative2.6%
Written reviews35 reviews
Positive94.3%
Neutral2.9%
Negative2.9%

Upload Simulator 2

All ratings18 ratings
Positive83.3%
Neutral5.6%
Negative11.1%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

Bugs and requests

Spark

Reported bugs

2 issues
  • Ad not loading
  • Game broke (production NaN, destruction bonus INF)

Requested features

7 requests
  • More updates
  • Continue the story
  • Add more evolution upgrades
  • Add something at the end (e.g., restart with multiplier)
  • Pay to have 2X multiplier forever
Show 2 more
  • Add Altar of Knowledge (if not unlocked)
  • More content

Upload Simulator 2

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Spark

No in-app purchases

None

Upload Simulator 2

No in-app purchases

Questions

Is Spark free?
Spark is free to download, with no in-app purchases.
Is Upload Simulator 2 free?
Upload Simulator 2 costs $3.99, with no in-app purchases.
Which has better reviews, Spark or Upload Simulator 2?
Spark is rated higher. Spark averages 4.8 out of 5 from 233 ratings, while Upload Simulator 2 averages 4.4 from 18 ratings.
Do Spark or Upload Simulator 2 have ads?
Neither Spark nor Upload Simulator 2 shows ads.
Which is updated more often, Spark or Upload Simulator 2?
Spark ships an update every 3 weeks, and Upload Simulator 2 every 2 days. Most recently, Spark was updated on October 5, 2026 and Upload Simulator 2 on October 1, 2026.

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