Apps like Game Master Helper

Here are some great alternatives to Game Master Helper by MobileMarketResearch :
Game Master's Toolkit 5e
Game Master's Toolkit 5e
★4.6
Behind the Tables
Behind the Tables
★4.7
DungeonRoller - RPG Generator
DungeonRoller - RPG Generator
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d20 Character Sheet
d20 Character Sheet
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D20 Complete Reference
D20 Complete Reference
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YourRoll
YourRoll
★4.4
Complete Reference for DnD 5
Complete Reference for DnD 5
★3.5
Game Master Journal
Game Master Journal
★3.9
Endless RPG Random Maps D&D 5e
Endless RPG Random Maps D&D 5e
★3.7
eRpgTools
eRpgTools
★3.9
Quest Portal VTT
Quest Portal VTT
★3.4
Dungeon World Helper
Dungeon World Helper
★4.2
TTRPG Encounter Generator
TTRPG Encounter Generator
★4.3
GameMaster Dice
GameMaster Dice
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D&D 5e Character Keep
D&D 5e Character Keep
★4.0
D100 Dungeon Dice/Table Roller
D100 Dungeon Dice/Table Roller
★3.9