Siege Commander is a real-time, lane-based strategy game for Android that is free to play and includes in app purchases of $0.99 - $3.99 per item to remove ads and purchase in game currency.
Siege Commander plays on a field with two opposing sides of a field where there are five lanes for each player to send out their units. Units are used to either gather currency (used to purchase new units) or to defend or fight. The fighters fight the other players units as well as their base while the defenders defend from incoming attacks. Basically it is a game of balance where the player needs to decide on what units to play depending on what is happening on the field.
Pro 18 available units with 20 levels
There is currently 18 available units to use in game (with more promised in future updates) ranging from close range fighters, ranged attackers and defensive units. All can be purchased with the in-game currency earned in game. All 18 units can be used in the 20 available levels, making for a pretty good variety of situations of play.
Pro Evenly balanced RTS gameplay
The balancing of the gameplay works out quite well wherein the game can be tough if too many mistakes are made, but if played correctly works quite well. Starting out it can be a little easy but the game does ramp up to a challenging pace.
The pacing of each side sending out different troops allows for a game that the player needs to constantly be on their toes in order to counter what the other player is doing. In effect, real-time strategy working as intended.
Con In-game currency purchased through in-app purchase
The game does use in-game currency for purchasing new units to pay the game with though it does appear to evenly reward the currency for just playing. Of course the purchased in game currency could at first give a leg up to multiplayer players who just started.