Comparison

Nano Doc vs Underground Survival Game

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

Head to head
About

Nano Doc

Engage in a microscopic battle within a patient's bloodstream. Your mission is to eliminate invading bacteria and viruses while carefully avoiding vital red and white blood cells. Manage the patient's infection rate and temperature to prevent critical organ damage and win the game.

Highlights
  • Fight bacteria and viruses
  • Avoid red blood cells
  • Avoid white blood cells
  • Manage infection rate
  • Monitor patient temperature
  • Prevent brain cell death
Features
Read full description

Enter the bloodstream to fight off bacteria and viruses. You play the role of Nano Doc, inserted into the blood stream of a sick patient. You must destroy as many viruses and bacteria as possible without hitting the red blood cells or white blood cells. Killing red blood cells increases the heart rate causing the blood to pump faster making cells harder to hit. Killing white blood cells increases the rate of viral multiplication. Patient starts with a 50% viral infection, as bacteria and viruses are killed the infection goes down, but any bacteria or virus cells that slip past increase the infection. The patient starts with a temperature of 100 degree, as the infection goes up so does the temperature. If the temperature reaches 105 degrees the players brain cells start to die. If all the brain cells die the game is over. The game is won when the infection rate is 0

About

Underground Survival Game

Embark on an intense underground escape adventure. Navigate treacherous tunnels, avoid obstacles, and test your reflexes to find freedom before time runs out. Every level offers new challenges and unpredictable paths.

Highlights
  • Intense underground adventure
  • Speed strategy and survival
  • Avoid traps and obstacles
  • Challenging tunnel navigation
  • Fast-paced escape gameplay
  • Increasing difficulty
Features
Read full description

Get ready for an intense underground adventure where speed strategy and survival matter. Underground Escape Run takes you deep into hidden tunnels filled with traps obstacles and challenging paths. Run through dark passages avoid dangerous hurdles and find your way out before time runs out. Every level brings twists that test your reflexes and decision-making skills. Explore mysterious underground environments navigate tricky routes and experience a fast-paced escape journey like never before. Each run is different making every attempt exciting and unpredictable. Game Features: Smooth and responsive controls Increasing difficulty with each level Challenging tunnels and obstacle paths Immersive escape adventure experience Fast-paced underground running gameplay Can you survive the underground and complete your escape? Only the quickest and most intelligent players will survive!

Screenshots

Nano Doc1 screens
Underground Survival Game4 screens

Verdict

The call

The clearest difference is rating: Nano Doc at 3.7 against Underground Survival Game's 2.0. Nano Doc also leads on in-app purchases (none vs 7) and update cadence (every 4 days vs every 6 weeks). On price, review sentiment, ads and monetization model 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. Underground Survival Game sells 7 one-off in-app purchases. Nano Doc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Nano Doc holds the better App Store score, 3.7 against 2.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

Nano Doc ships an update every 4 days, Underground Survival Game every 6 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 5 level
Nano Doc versus Underground Survival Game: the parameters behind the verdict, then further details
ParameterNano DocUnderground Survival Game
PriceFreeFree
Rating3.7 (3 ratings) — better2.0 (1 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings3 — better1
Update frequencyEvery 4 days — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size205 MB264 MB
Age rating9+4+
DeveloperChristopher CarnellTalha Abbasi

Customer experience

Nano Doc

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Underground Survival Game

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Nano Doc

No in-app purchases

7 purchases

Underground Survival Game

One-time7
  • prisonescapedcashsmallbundle$1.99
  • prisonescapeddrinksmallbundle$1.99
  • prisonescapeddrinkmediumbundle$1.99
Show 4 more
  • prisonescapedcashmediumbundle$2.99
  • prisonremoveads$3.99
  • prisonescapedcashbigbundle$4.99
  • prisonescapeddrinkbigbundle$4.99

Questions

Is Nano Doc free?
Nano Doc is free to download, with no in-app purchases.
Is Underground Survival Game free?
Underground Survival Game is free to download, with in-app purchases available.
Which has better reviews, Nano Doc or Underground Survival Game?
Nano Doc is rated higher. Nano Doc averages 3.7 out of 5 from 3 ratings, while Underground Survival Game averages 2.0 from 1 ratings.
Do Nano Doc or Underground Survival Game have ads?
Neither Nano Doc nor Underground Survival Game shows ads.
Which is updated more often, Nano Doc or Underground Survival Game?
Nano Doc ships an update every 4 days, and Underground Survival Game every 6 weeks. Most recently, Nano Doc was updated on November 3, 2026 and Underground Survival Game on October 30, 2026.

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