Comparison

Nature Strikes Back TD vs keep

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

Head to head
About

Nature Strikes Back TD

Defend the Heart of Nature by merging powerful guardian spirits to fight off an invading pollution army. This game combines merge, tower defense, and idle mechanics for a unique fantasy experience.

Highlights
  • Merge and unlock 70+ guardian spirits
  • Defend against waves of pollution enemies
  • Battle boss Muckmares
  • Recycle spirits for rewards
  • Idle defense and rewards
  • Fantasy elements and cute characters
Features
Read full description

The Natural World is under attack by the MuckMonger Pollution Army of evil Mucklings and MuckMares! This dark army is now assaulting the entrance to Deep Earth where the Heart of Nature is kept. They must not be allowed to enter or all will be lost! But Nature is not completely defenseless! - Natural Guardian Spirits have emerged from the Deep Earth to defend Nature against the onslaught of the Mucklings and MuckMares - but we need your help! Merge the Natural Spirits to create stronger Guardians and strategically arrange them on the Last Patch in front of the entrance to Deep Earth to fight off the never-ending waves of Mucklings and defeat the MuckMare bosses. “Nature Strikes Back” combines the best aspects from merge games, tower defense games, and idle games into a unique gaming experience with fantasy elements and cute characters. *Nature Strikes Back is a Merge Game! Merge the Natural Spirits to unlock the cute characters that are ever stronger Guardian Spirits! *Nature Strikes Back is a Tower Defense Game! Nature needs your help to defend the entrance to the Deep Earth and the Heart of Nature! *Nature Strikes Back is also an Idle Game! Even while you are away, you can continue to defend Nature and earn rewards! Features: Merge and unlock 70+ cute Natural Guardian Spirits! Defeat waves and waves of the Pollution Army of Mucklings and the boss Muckmares! Recycle your extra Natural Guardian Spirits for rewards! Continue to defend the entrance to Deep Earth even while you’re idle! Nature Strikes Back is free to play, though some in-game items can also be purchased for real money. You can turn off the payment feature by disabling in-app purchases in your device’s settings. Privacy Policy: https://www.digitalwill.co.jp/privacy-policy Terms of Service: https://www.digitalwill.co.jp/terms-of-service

About

keep

Features
Read full description

In the game, players control the character to jump over obstacles through the touch screen. The operation of the game is very sensitive to the touch, while controlling multiple characters to ensure they do not touch obstacles. The game adopts a record breaking mode with unrelated cards, and players need to be fully focused in order to get high scores. Come on! Keep running! Stay alive!

Screenshots

Nature Strikes Back TD4 screens
keep4 screens

Verdict

The call

The clearest difference is in-app purchases: keep at none against Nature Strikes Back TD's 15. keep also leads on ads (none vs shown) and update cadence (every 2 days vs monthly). On price, device support and iOS requirement 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. Nature Strikes Back TD sells 15 in-app purchases, starting at $3.99 per 7 days. keep asks for nothing beyond the download.

UpkeepUpdate frequency

Nature Strikes Back TD ships an update monthly, keep every 2 days. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

Scorecard3 real differences · 7 level
Nature Strikes Back TD versus keep: the parameters behind the verdict, then further details
ParameterNature Strikes Back TDkeep
PriceFreeFree
Rating4.8 (799 ratings) — better—
Positive reviews62.5% of reviews—
Number of ratings799 — better—
Update frequencyMonthlyEvery 2 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size69 MB7 MB
Age rating4+4+
DeveloperGMonsters Inc.思航 赵

Bugs and requests

Nature Strikes Back TD

Reported bugs

3 issues
  • Purchased features not working
  • Progression reset
  • Reduced currency earning

Requested features

2 requests
  • Dark mode option
  • Better ad monetization balance

keep

Not enough reviews yet to summarise bugs or requests.

In-app purchases

15 purchases

Nature Strikes Back TD

Subscriptions2
  • VIP Subscription$3.997 Days
  • VIP Subscription3 Days trial$7.997 Days
One-time13
  • 30 gems$0.99
  • Double Offline Earnings$0.99
  • Coin Bundle$0.99
Show 10 more
  • Remove banner/interstitial ads$0.99
  • Coin Bundle$1.99
  • Remove banner/interstitial ads$2.99
  • 180 gems$4.99
  • Unlock Fort$5.99
  • Unlock Fort$9.99
  • 420 gems$9.99
  • 960 gems$19.99
  • 2550 gems$49.99
  • 5700 gems$99.99
None

keep

No in-app purchases

Questions

Is Nature Strikes Back TD free?
Nature Strikes Back TD is free to download, with in-app purchases available.
Is keep free?
keep is free to download, with no in-app purchases.
Do Nature Strikes Back TD or keep have ads?
Nature Strikes Back TD shows ads; keep does not.
Which is updated more often, Nature Strikes Back TD or keep?
Nature Strikes Back TD ships an update monthly, and keep every 2 days. Most recently, Nature Strikes Back TD was updated on October 17, 2026 and keep on October 6, 2026.

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