Here you can check what software is allowed or not in PokerStars:
https://www.pokerstars.com/poker/room/prohibited/
for those who is too lazy to click links.
From Pokerstar question "Can you give some examples of acceptable tools and services ?"
The following are examples of tools and services that are permitted:
NOTE: we do not make any guarantees regarding the functionality, reliability, or safety of any of these tools or services.
AdvancedPokerTraining Auto HandPoster CardRunners EV†
ChangeMyHUD DriveHUD† EasyStreet
FlopInspector† Flopzilla (version 1.7.9 and newer) † FreePokerDB (aka FPDB)
Gam Poker Analyzer Hand2Note† Holdem Indicator†
Hold'em Manager 2 Hold'em Profiler HoldemBoss (version 24 and newer) †
HotkeysPS HotkeysFT InfoPS
iHoldemIndicator^ iOmahaIndicator^ Jivaro
Koculator † MacroPoker NiceHandOmaha
NoteCaddy† Official Poker Rankings Omaha Indicator
OpenTool PioSolver† PlaceMint
PLO Ranger Poker Copilot Poker HoleCards
Poker Indicator Poker Office Poker Pro Labs
Poker Wizard Poker4Tuna PokerAnalytics
PokerAssistant ByPlayers PokerJuice PokerRanger
PokerSnowie† PokerSolver Poker-Spy
PokerStrategy SideKick PokerTracker 4 † PokrHUD
PS Hand Watcher PS Last Hand PS Mate
PS Never SitOut PS Play ByVoice PS Wins Viewer
PS Zoom Database PSHandler (version 1.31 and newer) RankExplorer
Selektor SessionsManager
sharkscope (including Sharkscope HUD)
SimplePostflop † SitnGo Wizard (version 1.0.1.163 and newer) † SmartBuddy
StackAndTile StarsCaption StarsHelper
Stud Indicator TableDroid TableHook
Table Ninja II (version 2.6.13 and newer) † Table of Interest Table Optimizer
Table Tamer ThePokerDB TiltBreaker
TimeMojo Tournament Indicator Unfold Poker
Universal Poker Table Organizer Xeester ZenPokerDojo †
27/07/2017
^ Denotes tool is compatible with Mac OS X only
† Denotes tool offers a limited subset of features when our software is open, in order to comply with our policy