Comparison

Nix Solo vs PillLedger

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Nix Solo

Monitor personal fluid and electrolyte losses in real-time during workouts. This app provides insights into sweat composition and hydration needs based on individual biology, using data from a companion biosensor.

Highlights
  • Real-time fluid and electrolyte loss monitoring
  • Personalized sweat composition insights
  • Correlates sweat data with environmental factors (Nix Index)
  • Post-workout Sweat Intelligence reports
  • Integration with Apple Watch and Garmin devices
  • Workout type and hydration input
Features
Read full description

To train at your peak, you can’t just train hard. You need to train in a way that’s informed by your personal biology. The Nix Solo app allows users to monitor their own personal fluid and electrolyte losses in real time during a workout using the Nix Hydration Biosensor. This companion app provides valuable insight into their unique sweat composition and individual hydration needs based on their personal biology. At Nix, we built the first biosensor to analyze sweat and provide endurance athletes with personal hydration data – scientifically validated, and delivered in real time. Once paired with the Nix Hydration Biosensor, you are on your way to understanding your hydration needs with Nix Solo, our individual monitoring app. We’re the first hydration biosensor of its kind — the only pod, patch, and free app combination to: - Evaluate the electrochemical biomarkers in your sweat - Send real-time updates to your phone, Apple Watch, Garmin Watch, or Garmin Bike Computer - Correlate your sweat data and your training environment with the Nix Index – a composite index of six environmental factors: temperature, humidity, dew point, altitude, wind speed, and solar load - Provide post workout Sweat Intelligence via insights on your Sweat Profile including fluid loss rate, electrolyte loss rate and sweat composition metrics Before your workout, tell the Nix Solo app what type of workout you’re doing and what you’ll be hydrating with. You can also consult the Nix Index to see how your environment impacts your hydration needs. Once you start sweating, our single-use patch begins measuring and analyzing your fluid and electrolyte losses minute by minute- metrics that represent your unique “sweat composition.” This data is instantly streamed to our app, and can also be shared with devices like your Apple Watch, Garmin Watch, and Garmin bike computer. The result is knowing when, what, and how much to drink in real time to enhance both safety and performance.

About

PillLedger

Features
Read full description

PillLedger is the simplest way to keep a reliable record of every dose, every day. Whether you're managing one prescription or several, PillLedger gives you a clear daily schedule and one-tap logging — no account needed, no cloud required, no complexity. **Track every medication** Add all your pills, vitamins, and supplements. Set the exact name, dosage, and one or more times of day for each one. **Know what's due at a glance** The Today screen shows everything you need to take, in order by time. Tap the circle to mark a dose taken. Tap again to undo a mistake. **Never miss a dose** PillLedger reminds you at every scheduled time with a clear, gentle notification — every single day. **Review your history** The 14-day history screen shows a green checkmark for every dose taken and a red mark for every dose missed, so you can spot patterns and stay on track. **Designed for real life** Large text, clean layout, and high-contrast colors make PillLedger easy to use for everyone — especially if you're managing medications for a parent or loved one. **Private by design** Everything stays on your device. PillLedger has no account, no login, no server, and no analytics. Your medication list is yours alone. --- PillLedger is a personal reminder tool, not a medical device. Always follow the guidance of your doctor or pharmacist. ---

Screenshots

Nix Solo4 screens
PillLedger4 screens

Verdict

The call

The clearest difference is device support: Nix Solo at 4 against PillLedger's 2. Nix Solo also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Nix Solo ships an update every 10 days, PillLedger fortnightly. The most recent releases landed on November 7, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Nix Solo versus PillLedger: the parameters behind the verdict, then further details
ParameterNix SoloPillLedger
PriceFreeFree
Rating4.8 (69 ratings) — better—
Positive reviews14.3% of reviews—
Number of ratings69 — better—
Update frequencyEvery 10 days — betterFortnightly
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.1 — better17.0
Further details — not scored
Size65 MB2 MB
Age rating4+4+
DeveloperNix, Inc.Btown Labs, LLC

In-app purchases

None

Nix Solo

No in-app purchases

None

PillLedger

No in-app purchases

Questions

Is Nix Solo free?
Nix Solo is free to download, with no in-app purchases.
Is PillLedger free?
PillLedger is free to download, with no in-app purchases.
Do Nix Solo or PillLedger have ads?
Neither Nix Solo nor PillLedger shows ads.
Which is updated more often, Nix Solo or PillLedger?
Nix Solo ships an update every 10 days, and PillLedger fortnightly. Most recently, Nix Solo was updated on November 7, 2026 and PillLedger on October 25, 2026.

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