We pulled 4,730 App Store reviews across the 10 most-downloaded hydration tracking apps on iOS. 1,061 of them were 1 or 2 stars.
We read every single one.
The complaints aren’t random. They cluster into a handful of patterns that repeat across every app in the category. This post is that analysis — what people hate, why they leave, and what a better app would look like.
The numbers
| App | Reviews analyzed | 1–2 star |
|---|---|---|
| Daily Water Tracker Reminder | 612 | 198 |
| Drink Water Reminder N Tracker | 589 | 143 |
| My Water: Daily Drink Tracker | 521 | 121 |
| Water Tracker by WaterMinder | 498 | 89 |
| Water tracker Waterllama | 467 | 72 |
| HidrateSpark Water Tracker | 441 | 118 |
| Drink water: Drinking reminder | 408 | 134 |
| Water Reminder - Daily Tracker | 387 | 98 |
| Daily Water - Drink Reminder | 361 | 56 |
| Plant Nanny Cute Water Tracker | 446 | 32 |
| Total | 4,730 | 1,061 |
The average 1–2 star rate across these apps is 22%. That’s 1 in 5 people leaving a negative review. For context, most well-designed consumer apps sit at 8–12%.
Pattern 1: Paywalls that break the core loop (220 reviews)
The most common complaint isn’t price. It’s the paywall appearing at the moment of action — when someone tries to log water and gets blocked.
“I think it’s stupid that anyone who wishes to hydrate better must pay insane prices for premium. I have tried countless apps labeled ‘free’ and it’s sad that this is the best one I was able to find.” — My Water: Daily Drink Tracker
“Like so many others I’m leaving this review to avoid paying $1.99 to continue using this app. I don’t appreciate being coerced like that, especially when nothing was said about it when I downloaded it.” — Daily Water Tracker Reminder
The frustration isn’t “this app costs money.” It’s “I started using this app, built a habit, and then got stopped mid-action by a paywall I didn’t see coming.” The moment of friction is the worst possible moment: when the app is supposed to be helping.
Pattern 2: Notification behavior that can’t be controlled (119 reviews)
Reminders are the whole point of these apps. But broken, uncontrollable, or spammy notifications are one of the most consistent complaints.
“2nd Update: None of the issues previously mentioned have been addressed. Additionally, now this app is an ad spam bomb. Every tap results in a new ad popping up. Very annoying and cumbersome.” — Drink water: Drinking reminder
“For some reason became useless — this app was working ok but suddenly started to send 4–6 notifications for each alert I set but all silent. The sound went away.” — Daily Water Tracker Reminder
The pattern: users set up their reminders, then either the notifications stop working entirely, or they multiply out of control. Either way, the one thing the app is supposed to do reliably — remind you — becomes a source of frustration instead.
Pattern 3: Billing that doesn’t honor what was paid (96 reviews)
This is the one that generates the angriest reviews — and the most detailed ones.
“They make you pay $9.99 for a year then every few months the app responds like you’re new and makes you pay again.” — Daily Water Tracker Reminder
“I purchased a full access to this app (not a monthly access, a full one time fee). Didn’t use the app for two weeks and when I came back it was asking me to subscribe or see ads.” — Drink Water Reminder N Tracker
These aren’t complaints about price. They’re complaints about an app taking money and then failing to honor the transaction. The trust breakdown is complete — and the reviews read like it.
Pattern 4: Sync and widget failures (113 reviews)
Apple Watch support and home screen widgets are table-stakes features for a health app in 2024. Across this dataset, they’re consistently broken.
“I bought this app for the obvious reason of helping me drink more water and because it had an Apple Watch interface. Unfortunately the Apple Watch interface does not work. Every time I try to log a drink from my watch, the app does nothing.” — Water Reminder - Daily Tracker
“While it’s better than most trackers that hide nearly everything behind a pay wall, it’s got some serious limitations that make using it clunky at best.” — Drink Water Reminder N Tracker
Widget and watch sync failures are a loyalty killer — these features represent the most motivated users who are already bought in. Losing them here is expensive.
Pattern 5: Crashes and bugs on basic functionality (97 reviews)
Not edge cases — the core log action, the daily reset, the goal tracker.
“You can’t log water due to the ad blocking it.” — Daily Water Tracker Reminder
“The ads obstruct the entry icons. I loved this app when I used it a few years ago, it was so easy to use… I just downloaded it again and the new version has ads at the bottom covering the buttons I need to tap.” — Daily Water Tracker Reminder
When ads cover the log button, the app is literally broken. You can’t complete the one action the app exists to facilitate.
Pattern 6: Data loss (41 reviews)
Losing streak history, losing logged data, losing settings after an update.
“Uninstall, reinstall, set total water to 64 ounces, set bottle to 8 ounces, constantly resets itself to 6 ounces.” — Drink Water Reminder N Tracker
For habit-tracking apps specifically, data loss is existential. The streak IS the product. Losing it breaks the entire reason someone was using the app.
What the best-reviewed apps do differently
Plant Nanny stands out in this dataset with a 7% negative review rate vs. the 22% category average. The difference isn’t features — it’s mechanical integrity. The core loop works every time. The paywall is soft and clearly communicated upfront. The free experience is genuinely complete.
The apps with the highest negative rates share a common structure: a free tier designed to be frustrating rather than complete, aggressive mid-session upsells, and notification systems that weren’t properly QA’d.
What this means for Well Hydrated
We built Well Hydrated with this pattern in mind.
The free tier logs water instantly on a single tap — no interruption, no upsell at the moment of action. The paywall appears once, clearly, on day 2 — and has a genuine X button. Plus features are genuinely differentiated (custom reminder times, all biomes, full history, streak restore) without making the free experience feel crippled.
The notifications are user-controlled up to 6 custom times. The streak data is backed by iCloud Key-Value storage so it survives reinstalls.
We’re not claiming to be perfect. We’re one app, recently launched. But the problems in this dataset are not hard problems to solve — they’re execution failures on basics that every hydration app should get right.
If you’ve been burned by one of these apps, Well Hydrated is free to try.
Data sourced from App Store reviews as of March 2026. Apps included were the top 10 results by download volume for the search term “water tracker” on the iOS App Store in the United States.