| OnStar, LLC | 🍎 | 1 | 4.8★ | Lifestyle |
| OnStarboard LLC | 🍎 | 1 | 4.7★ | Navigation |
| OnStrategy Mobile | 🍎 | 1 | 4.5★ | Business |
| OnTaxi s.r.o. | 🍎 | 1 | 4.8★ | Travel |
| OnTheMarket.com | 🍎 | 1 | 4.7★ | Lifestyle |
| OnTheSnow / Skiinfo | 🍎 | 1 | 4.8★ | Weather |
| OnTheWay | 🍎 | 1 | 4.8★ | Travel |
| OnTimeTelecom, Inc. | 🍎 | 1 | 4.8★ | Productivity |
| OnWay | 🍎 | 1 | — | Business |
| Onanoff LTD. | 🍎 | 1 | — | Utilities |
| Onapps Enterprises Ltd | 🍎 | 1 | 4.6★ | Games |
| Onat Cipli | 🍎 | 1 | 4.5★ | Health & Fitness |
| Onca Studios OU | 🍎 | 1 | 4.5★ | Utilities |
| Once Upon Publishing AB | 🍎 | 1 | 4.9★ | Photo & Video |
| Once Upon an App | 🍎 | 1 | — | GAMES_MUSIC |
| Onchain Wallet Limited | 🍎 | 1 | 4.8★ | Finance |
| Onda Sports Inc | 🍎 | 1 | 5.0★ | Weather |
| Onder Caglar | 🍎 | 1 | 4.6★ | Productivity |
| Ondevtra AI | 🍎 | 1 | 4.0★ | Shopping |
| Ondrej Stanek | 🍎 | 1 | 4.7★ | Productivity |
| One Absolute Ltd | 🍎 | 1 | 4.2★ | Food & Drink |
| One Albania | 🍎 | 1 | 5.0★ | Utilities |
| One Call Concepts, Inc. | 🍎 | 1 | 5.0★ | Utilities |
| One Caribbean Media | 🍎 | 1 | 4.3★ | News |
| One Championship (Singapore) Pte. Ltd. | 🍎 | 1 | 4.7★ | Sports |
| One Color Games ApS | 🍎 | 1 | 4.9★ | Education |
| One Date Private Limited | 🍎 | 1 | — | Games |
| One Delivery | 🍎 | 1 | 4.7★ | Food & Drink |
| One Fat Giraffe | 🍎 | 1 | 5.0★ | Reference |
| One Game Limited | 🍎 | 1 | 4.4★ | Games |
| One Green Planet LLC | 🍎 | 1 | 4.4★ | Food & Drink |
| One Hundred Feet, Inc. | 🍎 | 1 | 4.0★ | Navigation |
| One In A Billion Ltd | 🍎 | 1 | 4.6★ | Music |
| One Life Diet Inc | 🍎 | 1 | 3.5★ | Health & Fitness |
| One Light Media LLC | 🍎 | 1 | 5.0★ | Education |
| One Magyarorszag Zrt. | 🍎 | 1 | 4.8★ | Utilities |
| One Man Left | 🍎 | 1 | 3.5★ | Games |
| One Medical Group, Inc. | 🍎 | 1 | 4.9★ | MEDICAL |
| One Mobikwik Systems Private Limited | 🍎 | 1 | 4.6★ | Finance |
| One Mornin Software Solutions Ltd | 🍎 | 1 | 5.0★ | Utilities |
| One Mount Group | 🍎 | 1 | 4.3★ | Business |
| One Pixel Studio | 🍎 | 1 | 4.6★ | Entertainment |
| One Resource Solution, LLC | 🍎 | 1 | — | Business |
| One Stack Solution Private Limited | 🍎 | 1 | 4.0★ | Finance |
| One Step LLC | 🍎 | 1 | 4.2★ | Utilities |
| One Stop German Shop | 🍎 | 1 | 4.9★ | Shopping |
| One Swipe Bets | 🍎 | 1 | 4.8★ | Sports |
| One Thing LTD | 🍎 | 1 | 4.7★ | Productivity |
| One Thousand And One Ops FZ LLC | 🍎 | 1 | 2.7★ | Entertainment |
| One Thum Software, LLC | 🍎 | 1 | 5.0★ | Finance |