You can upgrade the plane’s rank with cards + crystals, and the plane’s level with crystals or credits.
Upgrade Rank
- rank C to B requires 80 cards, and then 100 crystals
- rank B to A requires 160 cards, and then 200 crystals
- rank A to S requires 240 cards, and then 300 crystals
- rank S to SS requires 320 cards, and a whopping 800 crystals
Upgrade Levels with Crystals
Not considered here. Unless you are willing to buy a lot of crystals for IRL money, this is not recommended.
Upgrade Levels with Credits
There is an increasing cost for each level starting at 100 for Level 1 to 2, and ending on 47 300 for level 139 to 140. Here is a complete listings on Reddit.
These are the accumulated costs:
- 1 to 10: 5700 credits
- 1 to 20: 28 000 credits
- 1 to 30: 71 700 credits
- 1 to 40: 139 700 credits
- 1 to 50: 233 400 credits
- 1 to 60: 354 100 credits
- 1 to 70: 502 600 credits
- 1 to 80: 680 100 credits
- 1 to 90: 887 900 credits
- 1 to 100: 1 129 000 credits
- 1 to 110: 1 407 700 credits
- 1 to 120: 1 730 600 credits
- 1 to 130: 2 106 000 credits
- 1 to 140: 2 546 000 credits
Reaching level 100 will take 1.1 million credits, and reaching level 140 will take over 2.5 million credits. Plus crystals and cards.
Going to S rank level 80 is definitely worth it for every plane. Above that – well if you want the best, go for it. But consider this: Taking a plane to level 80 will cost under 700 000 credits. Taking it to Level 140 will cost another 1.8 million credits and 800 crystals. But again, many of use just can’t resist to max everything – right? 🙂