The best replacement for iaf is paf.

The best alternatives to iaf are rated as following:
★★★★★  paf
★★★★  usaf
★★★★  plaaf
★★  if
★★  raf
★  chinese air force
★  iaf
★  rsaf
  plaf

Your alternative for iaf is not listed? Suggest!
Speaking about iaf, one probably shouldn't forget about paf.

Other search terms related to iaf and their ratings are:
★★★★★ paf
You have in mind a companion for iaf and it is not yet here? Propose!



Google Trends

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iaf
paf
usaf