Idle 9 Months vs Merge Dragons!

How do Idle 9 Months and Merge Dragons! compare on difficulty, ad pressure, in-app-purchase pressure and what real reviewers say? A side-by-side look, grounded in App Store data.

 Idle 9 Months iconIdle 9 MonthsMerge Dragons! iconMerge Dragons!
GenreFamilyFamily
PriceFreeFree
Difficultyeasymedium
Ad intensityhighlow
In-app-purchase pressuremediumlow
Typical sessionvariablevariable
Rating4.8 / 54.7 / 5
Ratings count202,756420,381
Reviews say
What players like
  • Educational content about pregnancy and fetal development
  • Calming, relaxing gameplay
  • Scientifically accurate stages
Common complaints
  • Extremely long wait times (9 real months or game-paced equivalent)
  • Intrusive ads every 30 seconds
  • Unclear progression and growth mechanics
What players like
  • Free-to-play with no forced ads
  • Cozy, relaxing gameplay suitable for families
  • Long-term progression without mandatory spending
Common complaints
  • Dragons harvest items without player permission, causing frustration
  • Critical bug: reinstalling after app crash deletes all progress permanently
  • Gems are nearly impossible to obtain without paying real money

Idle 9 Months — Simulate a realistic 9-month pregnancy journey from conception to birth, learning about fetal development along the way. (rated easy difficulty, high ad pressure) Merge Dragons! — Merge magical objects and evolve dragons to restore a cursed fantasy world at your own relaxing pace. (rated medium difficulty, low ad pressure)

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Data: Apple App Store, as of 2026-07-10. Last updated 2026-07-10.