What people are building

Apps that track where money goes. The most crowded family on the store and the easiest to start: the data model is small, but users expect bank syncing and years of history before they will switch.

• Expense tracker see the apps 848 Copy link to this type
• Crypto portfolio see the apps 640 Copy link to this type
• Invoice maker see the apps 511 Copy link to this type
• Currency converter see the apps 285 Copy link to this type
• Receipt scanner see the apps 243 Copy link to this type
• Savings goal see the apps 228 Copy link to this type
• Stock tracker see the apps 194 Copy link to this type
• Debt payoff see the apps 176 Copy link to this type
• Bill reminder see the apps 153 Copy link to this type
• Subscription tracker see the apps 104 Copy link to this type
• Budget tracker see the apps 77 Copy link to this type
• Tip calculator see the apps 65 Copy link to this type

Logging the body — food, movement, sleep, cycles. Retention lives or dies on how little typing a daily entry takes, and anything medical draws extra App Store review scrutiny.

• Workout planner see the apps 2,900 Copy link to this type
• Sleep tracker see the apps 1,176 Copy link to this type
• Calorie counter see the apps 843 Copy link to this type
• Weight tracker see the apps 628 Copy link to this type
• Meditation see the apps 582 Copy link to this type
• Pregnancy tracker see the apps 305 Copy link to this type
• Intermittent fasting see the apps 243 Copy link to this type
• Medication reminder see the apps 200 Copy link to this type
• Period tracker see the apps 198 Copy link to this type
• Step counter see the apps 177 Copy link to this type
• Blood pressure log see the apps 175 Copy link to this type
• Water reminder see the apps 94 Copy link to this type

Getting things done and remembering them. Enormously crowded, and the apps that survive win on speed of capture and sync rather than on features.

• Calendar planner see the apps 3,226 Copy link to this type
• Document scanner see the apps 3,149 Copy link to this type
• Note taking see the apps 1,372 Copy link to this type
• Habit tracker see the apps 1,110 Copy link to this type
• To-do list see the apps 753 Copy link to this type
• Countdown timer see the apps 573 Copy link to this type
• Pomodoro timer see the apps 351 Copy link to this type
• Password manager see the apps 347 Copy link to this type
• Goal tracker see the apps 249 Copy link to this type
• Time tracker see the apps 161 Copy link to this type
• Reading tracker see the apps 85 Copy link to this type
• Mind map see the apps 37 Copy link to this type

Small tools that do one job on demand — convert, scan, measure, clean. Cheap to build and easy to rank for, but users arrive through search and rarely come back on their own.

• Calculator see the apps 3,370 Copy link to this type
• Unit converter see the apps 1,602 Copy link to this type
• Translator see the apps 1,594 Copy link to this type
• Widget maker see the apps 1,225 Copy link to this type
• Storage cleaner see the apps 1,092 Copy link to this type
• VPN see the apps 846 Copy link to this type
• Wi-Fi analyzer see the apps 698 Copy link to this type
• QR code scanner see the apps 691 Copy link to this type
• Remote control see the apps 231 Copy link to this type
• Battery monitor see the apps 179 Copy link to this type
• File manager see the apps 94 Copy link to this type
• Screen recorder see the apps 3 Copy link to this type

Editing and making things out of pictures and video. Heavy on-device processing, and the category where a single good effect can carry an app.

• Wallpaper see the apps 1,225 Copy link to this type
• Photo editor see the apps 996 Copy link to this type
• Collage maker see the apps 477 Copy link to this type
• Video editor see the apps 351 Copy link to this type
• GIF maker see the apps 337 Copy link to this type
• Meme maker see the apps 264 Copy link to this type
• Photo cleaner see the apps 209 Copy link to this type
• Watermark see the apps 148 Copy link to this type
• Slideshow maker see the apps 126 Copy link to this type
• Video compressor see the apps 110 Copy link to this type
• Background remover see the apps 72 Copy link to this type
• Photo book & prints see the apps 41 Copy link to this type

The household and the everyday — meals, pets, plants, journals, cars. Smaller audiences per niche, with much less competition than money or productivity.

• Pet care see the apps 4,329 Copy link to this type
• Baby tracker see the apps 2,293 Copy link to this type
• Journal & diary see the apps 2,186 Copy link to this type
• Recipe & meal planner see the apps 1,090 Copy link to this type
• Plant care see the apps 730 Copy link to this type
• Grocery list see the apps 414 Copy link to this type
• Horoscope see the apps 372 Copy link to this type
• Chore & family organiser see the apps 155 Copy link to this type
• Mood tracker see the apps 129 Copy link to this type
• Home inventory see the apps 44 Copy link to this type
• Car maintenance see the apps 41 Copy link to this type
• Gift tracker see the apps 20 Copy link to this type

Practice and revision. Content is the real cost here, not code, and it is the category where a subscription is easiest to justify.

• Quiz & trivia see the apps 2,774 Copy link to this type
• Math solver see the apps 1,857 Copy link to this type
• Exam prep see the apps 1,819 Copy link to this type
• Language learning see the apps 1,316 Copy link to this type
• Dictionary & thesaurus see the apps 1,274 Copy link to this type
• Kids learning see the apps 854 Copy link to this type
• Flashcards see the apps 830 Copy link to this type
• Coding practice see the apps 282 Copy link to this type
• Music practice see the apps 263 Copy link to this type
• Handwriting practice see the apps 229 Copy link to this type
• Typing practice see the apps 110 Copy link to this type
• Astronomy & stargazing see the apps 45 Copy link to this type

Tools for running a small operation — booking, invoicing, stock, hours. Fewer downloads than consumer apps, and by far the highest willingness to pay.

• Point of sale see the apps 490 Copy link to this type
• CRM & contacts see the apps 429 Copy link to this type
• Inventory manager see the apps 352 Copy link to this type
• Appointment booking see the apps 343 Copy link to this type
• Employee time clock see the apps 343 Copy link to this type
• E-signature & contracts see the apps 283 Copy link to this type
• Business card scanner see the apps 164 Copy link to this type
• Mileage tracker see the apps 115 Copy link to this type
• Payroll & payslip see the apps 69 Copy link to this type
• Delivery route planner see the apps 60 Copy link to this type
• Shift scheduler see the apps 18 Copy link to this type
• Quote & estimate builder see the apps 5 Copy link to this type

Getting there and being outdoors. Usage is seasonal and bursty, and offline behaviour matters more here than anywhere else.

• Offline maps see the apps 1,674 Copy link to this type
• Weather see the apps 1,036 Copy link to this type
• Flight tracker see the apps 647 Copy link to this type
• Fishing & tides see the apps 565 Copy link to this type
• Public transit see the apps 551 Copy link to this type
• Hiking & trails see the apps 398 Copy link to this type
• Trip planner see the apps 148 Copy link to this type
• Camping & campgrounds see the apps 133 Copy link to this type
• Cycling & bike routes see the apps 117 Copy link to this type
• Packing list see the apps 86 Copy link to this type
• Road trip & fuel prices see the apps 78 Copy link to this type
• Ski & snow report see the apps 20 Copy link to this type

Apps built around a model rather than a database — chat, generation, transcription. The newest family, the fastest growing, and the one where running costs scale with use rather than with downloads.

• AI chat assistant see the apps 1,059 Copy link to this type
• AI photo enhancer see the apps 839 Copy link to this type
• AI video generator see the apps 586 Copy link to this type
• AI image generator see the apps 499 Copy link to this type
• AI voice & speech see the apps 442 Copy link to this type
• AI study helper see the apps 290 Copy link to this type
• AI resume builder see the apps 243 Copy link to this type
• AI transcription see the apps 234 Copy link to this type
• AI headshot & avatar see the apps 145 Copy link to this type
• AI writing assistant see the apps 99 Copy link to this type
• AI PDF & document chat see the apps 57 Copy link to this type
• AI code assistant see the apps 14 Copy link to this type

Casual formats people already understand: puzzles, words, cards, idle loops. Discovery is brutal, but the mechanics are well-trodden and cheap to prototype.

• Puzzle game see the apps 7,445 Copy link to this type
• Simulation game see the apps 2,984 Copy link to this type
• Idle & clicker see the apps 2,376 Copy link to this type
• Card & solitaire see the apps 1,923 Copy link to this type
• Coloring book see the apps 1,387 Copy link to this type
• Racing game see the apps 1,121 Copy link to this type
• Board game see the apps 826 Copy link to this type
• Word game see the apps 721 Copy link to this type
• Match-3 see the apps 702 Copy link to this type
• Hidden object & escape see the apps 685 Copy link to this type
• Sudoku see the apps 673 Copy link to this type
• Crossword see the apps 333 Copy link to this type

Listening, recording and making sound. Background audio and lock-screen controls are the hard part, and licensing is the reason most of these stay tools rather than catalogues.

• Music player see the apps 299 Copy link to this type
• Podcast player see the apps 283 Copy link to this type
• Ringtone maker see the apps 269 Copy link to this type
• Voice recorder see the apps 196 Copy link to this type
• White noise see the apps 187 Copy link to this type
• Sheet music & chords see the apps 181 Copy link to this type
• Soundboard & effects see the apps 176 Copy link to this type
• Voice changer see the apps 136 Copy link to this type
• Audiobook see the apps 133 Copy link to this type
• Beat maker & DJ see the apps 99 Copy link to this type
• Audio editor see the apps 89 Copy link to this type
• Karaoke see the apps 86 Copy link to this type

Spending better — prices, coupons, parcels, rewards. Usually depends on data someone else owns, so the durable ones either scrape carefully or partner.

• Cashback & rewards see the apps 792 Copy link to this type
• Auction & bidding see the apps 308 Copy link to this type
• Resale marketplace see the apps 274 Copy link to this type
• Loyalty cards see the apps 165 Copy link to this type
• Barcode shopping scanner see the apps 110 Copy link to this type
• Coupons & deals see the apps 90 Copy link to this type
• Wishlist see the apps 68 Copy link to this type
• Package tracker see the apps 55 Copy link to this type
• Price tracker see the apps 48 Copy link to this type
• Weekly ads & flyers see the apps 16 Copy link to this type
• Gift finder see the apps 13 Copy link to this type
• Size & fit guide see the apps 7 Copy link to this type