The short answer
Every water tracker on the App Store can log a glass of water. They differ almost entirely in how they keep you coming back — so there's no single winner, only a best pick per category:
- Best all-rounder — Waterllama, if your iPhone runs iOS 17.
- Best progression, and no account at all — AquaJoy: XP across 100 levels, collectible pins, reminders that switch off once you hit your goal, and a one-time lifetime unlock as an alternative to a subscription.
- Best plain logging — WaterMinder, if you want the data and not the game.
- Best virtual pet — Plant Nanny.
- Best background rank — Hydro Coach.
- Best minimal — My Water.
- Best on an old iPhone — Water Reminder (iOS 13) or Drink Water Reminder (iOS 12).
- No extra app — Apple Health, and low expectations.
Disclosure: AquaJoy is our own app. So we've done two things to keep this list worth reading: every app here gets a “where it falls short” section including ours, and we don't claim AquaJoy is the best water tracker overall — Waterllama has six years and 159,000 ratings on it, and no amount of writing changes that. What AquaJoy is best at is a specific thing, stated plainly in its own section below. Every factual claim comes from public App Store listings checked in August 2026; ratings and requirements move, so treat the numbers as a snapshot.
| App | Best for | Motivation style | Runs on | Apple Watch | App Store rating |
|---|---|---|---|---|---|
| Waterllama | Best all-rounder | Collect 140 characters, challenges | iOS 17+ | Yes | 4.9 (159,000+ ratings) |
| AquaJoy | Progression, and no account at all | XP, 100 levels, streaks, pins | iOS 15.1+ | No | New — launched Aug 2026 |
| WaterMinder | Plain, detailed logging | None — it's a ledger | iOS 16+ | Yes | 4.7 (34,000+ ratings) |
| Plant Nanny | Virtual-pet motivation | Grow a plant that wilts | iOS 15+ | Yes | 4.7 (106,000+ ratings) |
| Hydro Coach | A rank in the background | Lifetime sea-creature status | iOS 17+ | Yes | 4.7 (about 1,000 ratings) |
| My Water | Minimal tracking | Small motivational awards | iOS 18+ | Yes | 4.7 (24,000+ ratings) |
| Water Reminder (VGFIT) | Older iPhones | None — scheduled nudges | iOS 13+ | Yes | 4.7 (78,000+ ratings) |
| Drink Water Reminder | Oldest iPhones | None — scheduled nudges | iOS 12+ | Yes | 4.5 (152,000+ ratings) |
| Apple Health | No extra app | None | Any iPhone | Yes | Built into iOS |
All nine are free to download. All of them except Apple Health sell an optional paid upgrade, and the honest difference between them is what sits behind that paywall — more on that in the best genuinely free water reminder apps.
Best all-rounder — Waterllama
Best for: almost everyone, if your iPhone runs iOS 17- Free + in-app purchase
- iOS 17+
- Apple Watch
- 4.9★
Waterllama is the app to beat, and its App Store record backs that up: a 4.9 average across more than 159,000 ratings, a 2022 App Store Award, and an Apple Design Award nomination the same year. It tracks over 150 beverage types with different hydration credit, has 140 collectible characters that fill as you drink, runs timed challenges, and ships a proper Apple Watch app plus home screen, lock screen and Control Center widgets.
Where it falls short: it requires iOS 17, which rules out a lot of working iPhones. And the sheer volume of characters, challenges and beverage types is exactly the wrong thing for someone who wants to tap once and put their phone down.
Best progression, and no account at all — AquaJoy
Best for: people who want a scoreboard, not a spreadsheet- Free + optional Premium
- iOS 15.1+
- No account, ever
- Lifetime unlock available
This one is ours. Here's the specific case for it.
It uses progression, not pets or collections. Every log earns XP toward one of 100 levels, daily goals build streaks, and hydration milestones unlock collectible pins. The difference from a character set or a plant is direction: a collection can sit half-finished and stare at you, and a plant can wilt at you, but a level bar only ever moves forward. If guilt-based apps have bounced off you before, that's the mechanic to try — and at 100 levels it's a deeper run than the single slow rank in the lighter apps.
The reminders switch off when you're done. They run inside a window you choose and stop for the day the moment you hit your goal. That sounds minor and isn't: being buzzed at 6pm about water you already drank at 3 is the single most common reason people mute hydration notifications, and muting them is how the habit quietly dies. The longer version of that argument is here.
No account, and nothing to cancel. There's no sign-up and no email — hydration data stays on your device. Premium is optional, and it's sold as a one-time lifetime unlock as well as an annual plan, so you can pay once and never face a renewal — and nothing to cancel if you never buy it.
It runs on more iPhones than most of this list. iOS 15.1 is a lower floor than Waterllama, Hydro Coach (both iOS 17) or My Water (iOS 18). If your phone is a few years old but you still want a modern, actively developed app, the shortlist is short and AquaJoy is on it.
Where it falls short: it launched in August 2026, so there's no rating history to point at yet. There's no Apple Watch app and no Apple Health sync, and it's English-only for now. If you log from your wrist or you want to carry an existing Health history across, that's a genuine reason to pick something else today.
Best plain logging — WaterMinder
Best for: people who want the data, not the game- Free + in-app purchase
- iOS 16+
- Apple Watch
- 4.7★
WaterMinder has been on the App Store since 2013, which in this category is an eternity, and it shows in the parts that matter for long-term use: intake calculated from body weight, detailed history, widgets, Apple Health sync and a mature Apple Watch app. If you want to look back at six months of hydration data and actually trust it, this is the most conventional, most thoroughly documented choice here.
Where it falls short: it's a tracker, not a motivator. There's no reward loop at all, so if the thing stopping you from drinking water is boredom rather than record-keeping, WaterMinder doesn't solve your problem — which is why people go looking for alternatives to it.
Best virtual pet — Plant Nanny
Best for: people who'd water a plant before they'd water themselves- Free + in-app purchase
- iOS 15+
- Apple Watch
- 4.7★
Plant Nanny's premise is one good idea executed properly: every glass you drink waters a digital plant, which grows when you hydrate and visibly suffers when you don't. Plants come in three difficulty levels and collect into a greenhouse over time. With 106,000+ ratings at 4.7, it clearly works for a lot of people — guilt about a cartoon succulent turns out to be a real motivator.
Where it falls short: the same guilt mechanic that works on some people actively repels others, and the plant-care layer means more taps per day than a pure tracker needs.
Best background rank — Hydro Coach
Best for: a reward loop that stays out of the way- Free + in-app purchase
- iOS 17+
- Apple Watch
- 4.7★
Hydro Coach sits between the plain trackers and the full games: personalised intake, quick drinks, stats and history, a widget, Apple Watch complications and Apple Health integration, with a lifetime sea-creature rank you climb as you keep logging. The ranking system is a genuinely light touch compared to collecting 140 characters.
Where it falls short: under a thousand ratings means far less of a track record than anything above it, and a single rank that moves slowly may not carry you through the first month — which is exactly when you need carrying.
Best minimal tracker — My Water
Best for: a number, a graph and a nudge- Free + in-app purchase
- iOS 18+
- Apple Watch
- 4.7★
My Water has been shipping since 2015 and was among the first hydration apps with Apple Watch support. The feature list is deliberately short: an intake calculator, reminders, metric and imperial units, graphs, and small motivational awards. If every other app on this list feels like too much, this is the one that gets out of the way.
Where it falls short: it now requires iOS 18, a steep floor for an app this simple, and the awards are thin as a motivation layer.
Best on an older iPhone — Water Reminder, or Drink Water Reminder
Best for: a phone that can't run current iOS- Free + in-app purchase
- iOS 13+ / iOS 12+
- Apple Watch
- 4.7★ / 4.5★
These two exist for the case where the constraint is your hardware, not your taste. Water Reminder by VGFIT (iOS 13, 78,000+ ratings at 4.7) calculates a target and spaces reminders between your wake and sleep times at an interval you choose, with custom drink volumes, daily/weekly/monthly history and Apple Health sync. Drink Water Reminder N Tracker (iOS 12, 152,000+ ratings at 4.5) goes back further still, with an intake calculator based on sex, weight and climate, individually editable notifications and an automatic bedtime mode.
Where they fall short: both interfaces show their age, neither has any reason to open it beyond the notification itself, and the reminders fire on their schedule regardless of what you've already drunk. Worth knowing: if your iPhone runs iOS 15.1 or later, you aren't limited to these two — several modern apps, AquaJoy included, still support it.
No extra app — Apple Health
Best for: logging water without installing anything- Free, built into iOS
- Any iPhone
- Apple Watch
- No account
Apple Health has a Water field under Nutrition, and you can add a daily figure by hand or let another app write to it. If all you want is a number stored alongside your other health data, you already have this.
Where it falls short: it takes several taps to add a single entry, there are no reminders, and there's no progress or feedback of any kind. In practice almost nobody keeps manual Health logging up for more than a few days — which is precisely the gap the other eight apps exist to fill.
How to actually choose one
Feature lists are a poor way to pick a hydration app, because every app here can log a glass of water and every app here can send a notification. The question that predicts whether you'll still be using it in three weeks is narrower: what makes you open it on day 12?
- Nothing, I just want the record. WaterMinder, or My Water if you want less.
- Something cute I'd feel bad about neglecting. Plant Nanny, or Waterllama's characters.
- Numbers going up. AquaJoy's XP and 100 levels, or Hydro Coach's slower single rank.
- No account and no subscription. AquaJoy: no sign-up at all, and a one-time lifetime unlock as an alternative to the annual plan.
- Nothing on my phone at all. Apple Health, and low expectations.
Two other things are worth checking before you commit, because they're the most common reasons people abandon an app in week one: whether the reminders stop once you've hit your goal rather than nagging you about water you've already drunk, and whether the app makes you create an account before you can log anything. AquaJoy was built around both — that's the short version of why it exists. Our longer breakdown of what separates a water tracking app you keep from one you delete covers the rest of the checklist.
And if you're not sure what number you're even aiming at, start with how much water you should actually drink a day before you pick the app to track it in.
Frequently asked questions
What is the best water tracking app for iPhone?
There isn't one best app for everyone, because these apps differ mainly in how they motivate you. Waterllama is the most polished all-rounder and the highest-rated on the App Store. AquaJoy is the pick for XP-style progression — 100 levels, streaks and collectible pins — it needs no account or sign-up of any kind, it keeps data on your device, its reminders stop once you've hit your goal, and its Premium can be bought once as a lifetime unlock rather than as a subscription. WaterMinder is the best choice for structured long-term logging and Apple Watch, and Plant Nanny suits people motivated by a virtual pet.
Are water tracking apps free?
Every app in this roundup is free to download, and all of them sell an optional paid upgrade. What differs is how much sits behind the paywall — some keep logging, a daily goal and reminders free and charge for extras, while others limit history, custom drink sizes or reminder frequency until you pay. AquaJoy keeps logging, your daily goal, reminders, streaks, XP and pins in the free tier, and its Premium is available as a one-time lifetime purchase rather than only as a subscription. How to check any app's paywall before installing.
Do water tracking apps work on Apple Watch?
Most of the established ones do. Waterllama, WaterMinder, Plant Nanny, Hydro Coach, My Water and Water Reminder all ship an Apple Watch app. AquaJoy currently does not, so if wrist logging matters, that narrows the list quickly.
Do I need an account to use a water tracker?
Not necessarily, and it's worth checking before you install. Some hydration apps require an email sign-up before you can log a single glass, which puts your intake history on someone's server. AquaJoy requires no account and keeps hydration data on the device.
Does a water tracking app actually help you drink more water?
It helps for as long as you keep using it, which is the real problem. Logging is trivially easy in every app on this list; staying interested past week two is not. That's why the habit mechanics matter more than the feature count.
Want the XP-and-pins version? AquaJoy is free, and there's no sign-up.
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