Comparison

NMR Solvent Peaks vs Countdown

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

Head to head
About

NMR Solvent Peaks

This utility helps organic chemists quickly identify potential impurities by searching a database of NMR data. Users can input solvent, peak multiplicity, and location to find candidate impurities. It supports both proton and carbon data searches.

Highlights
  • Search for impurities by mode, solvent, multiplicity, and ppm
  • View alphabetical list of all impurities
  • Adjust user interface handedness
  • Select color themes
  • Supports proton and carbon NMR data
Read full description

NMR Solvent Peaks is a conveniently-searchable version of the ungainly table of NMR data most organic chemists keep a copy of nearby. Instead of searching through the table for a peak near your unidentified peak, just enter your solvent and the peak's multiplicity and location and you'll have a short list of candidate impurities. NMR Solvent Peaks has support for searching both proton and carbon data, and references the widely-distributed 2010 Organometallics paper by Gregory Fulmer and coworkers and the 2016 OPRD paper by Gregory Whiteker and coworkers. Feature Highlights: - search for impurities based upon mode (proton/carbon), deuterated solvent, multiplicity, and ppm - select "show all" for ppm to see an alphabetical list of all impurities in the app's database - pick a color theme and adjust the user interface handedness

About

Countdown

Visually track important dates and goals with customizable widgets for your Home Screen and Lock Screen. Set up countdowns and count-ups for personal milestones, habits, or deadlines. Sync across devices and receive timely notifications.

Highlights
  • Home Screen and Lock Screen widgets
  • Count up and down timers
  • Recurrent event tracking
  • Calendar and Reminders synchronization
  • Customizable designs and templates
  • iCloud synchronization
  • Notifications for key dates
Features
Read full description

Track time with beautiful countdown widgets on your Home Screen and Lock Screen. Get the results you want by adding beautiful ALWAYS ON motivational countdowns to the device you use every day. On your wrist? On your Mac? Pretty Progress works there, too. Our objective is to support you achieve your goals. We beautifully track your goals so you don’t have to. What better place to remind yourself of the things that matter than the devices you use every day? Your life goals, your health routines, your personal habits, when your newborn arrives, the deadline of your PhD or your mother’s birthday… No matter what your goal is. Pretty Progress gives you beautiful countdowns with widgets to customize and track them all: - Count up & down towards a specific date or with a timer - Create recurrent events and count the days periodically - Synchronize and import Apple Calendar events and Reminders - Show the percentage of completion, how much time is left or how much time has past (time since). In years, months, weeks, days... or a combination of them - Beautiful and unique designs. 6 different templates to customize and add to your Home Screen, Lock Screen, Stand By (iOS 17), and Watch complications - Customize colors, icons, layout, fonts, size... and every little aspect of the countdown at any time. Create your own personal Home Screen and Watch Face - A dashboard to visualize all the timers and day counters created and understand your deadlines, goals, achievements, or recurrent tasks - Notifications: 1 week and 1 day before, and at the end of your countdown, and every day, week, month or year after your habit streak - A library to get inspired and create widgets easily - 3 different sizes for the Home Screen widgets: small, medium, and large - All Lock Screen widgets localizations available - All complication sizes for Watch Faces supported - Dark mode support - iCloud synchronization. Sync your countdowns on your iPhone, iPad, Apple Watch, and Mac (Silicon) automatically - Family sharing enabled for the PRO purchase WHAT CAN YOU TRACK? - Health routines - Personal habits progress - Countdown to Christmas - Days until your mother's birthday - Countdown to your next holidays - Days until your project release deadline - Days left until your next trip - Percentage of your gym routine complete - Days left until your wedding anniversary - Days until retirement - Days until your financial independence - Percentage of the year, month, week... - Days left until your kombucha is fermented - How many days you have left on your vacations - Countdown to tax submission - Days until your new child arrives - Countdown to that important exam - Days until your graduation - Percentage of the academic year left - Days until Superbowl - My love countdown - Streak of days of habits - Daily, weekly and monthly tasks - Time until your new job WE WOULD LOVE YOUR FEEDBACK: We love to improve, so any feedback is always welcome! For any question, issue, suggestion or anything you want to say, contact at: hi@prettyprogress.app ======================= The free version of Pretty Progress includes four custom countdown widgets with two designs, the default daily, weekly, monthly and yearly progress and some customization options. If you purchase Pretty Progress PRO, the payment will be charged to your iTunes account. If you purchase a monthly or yearly subscription, your account will automatically be charged for renewal within 24 hours prior to the end of the current subscription period unless you disable auto-renew. You can turn off auto-renewal at any time by going to your Account Settings on the App Store after purchase. ======================= Terms of Service: https://prettyprogress.app/terms-of-service Privacy Policy: https://prettyprogress.app/privacy-policy

Screenshots

NMR Solvent Peaks3 screens
Countdown4 screens

Verdict

The call

The clearest difference is in-app purchases: NMR Solvent Peaks at none against Countdown's 18. NMR Solvent Peaks also leads on rating (5.0 vs 4.7) and review sentiment (100% vs 82%). Countdown's advantage is update cadence (every 10 days vs every 3 months) and ratings volume (3K vs 11). On price, ads and device support 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. Countdown sells 14 in-app purchases, starting at $1.99 per month. NMR Solvent Peaks asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

NMR Solvent Peaks holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Countdown has 3K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 100% of NMR Solvent Peaks's written reviews are positive against 82% of Countdown's.

UpkeepUpdate frequency

NMR Solvent Peaks ships an update every 3 months, Countdown every 10 days. The most recent releases landed on June 1, 2026 and September 25, 2026 respectively.

Scorecard7 real differences · 3 level
NMR Solvent Peaks versus Countdown: the parameters behind the verdict, then further details
ParameterNMR Solvent PeaksCountdown
PriceFreeFree
Rating5.0 (11 ratings) — better4.7 (3K ratings)
Positive reviews100.0% of reviews — better81.6% of reviews
Number of ratings113K — better
Update frequencyEvery 3 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Apple Watch
Requires iOS15.5 — better18.0
Further details — not scored
Size1 MB183 MB
Age rating4+4+
DeveloperLucas Moorekeinois OU

Customer experience

NMR Solvent Peaks

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Countdown

All ratings3,031 ratings
Positive93.2%
Neutral2.5%
Negative4.3%
Written reviews602 reviews
Positive81.6%
Neutral5.6%
Negative12.8%

Bugs and requests

NMR Solvent Peaks

Not enough reviews yet to summarise bugs or requests.

Countdown

Reported bugs

3 issues
  • App crashes on launch for some users
  • Widgets not updating in real-time as expected
  • Countdown data resetting unexpectedly

Requested features

5 requests
  • More customization options for widgets
  • Ability to track non-time-based progress
  • Improved recurring event management
  • Notification/alarm feature when countdown ends
  • Wider range of color and font options

In-app purchases

None

NMR Solvent Peaks

No in-app purchases

14 purchases

Countdown

Subscriptions10
  • Unlimited access7 Days trial$1.991 Month
  • Unlimited access7 Days trial$2.991 Month
  • Pretty Progress PRO (Weekly)$4.997 Days
Show 7 more
  • Pretty Progress PRO (Weekly)3 Days trial$4.997 Days
  • Pretty Progress PRO (Monthly)7 Days trial2 variants$4.991 Month
  • Unlimited access7 Days trial$5.991 Year
  • Unlimited access7 Days trial$8.991 Year
  • Pretty Progress Pro (Annual)7 Days trial3 variants$14.991 Year
  • Pretty Progress Pro (Annual)1 Year trial$24.991 Year
  • Pretty Progress Pro (Annual)$24.991 Year
One-time4
  • Pretty Progress PRO (Lifetime)$29.99
  • Pretty Progress PRO (Lifetime)$34.99
  • Pretty Progress PRO (Lifetime)2 variants$49.99
Show 1 more
  • Pretty Progress PRO (Lifetime)$59.99

Questions

Is NMR Solvent Peaks free?
NMR Solvent Peaks is free to download, with no in-app purchases.
Is Countdown free?
Countdown is free to download, with in-app purchases available.
Which has better reviews, NMR Solvent Peaks or Countdown?
NMR Solvent Peaks is rated higher. NMR Solvent Peaks averages 5.0 out of 5 from 11 ratings, while Countdown averages 4.7 from 3K ratings.
Do NMR Solvent Peaks or Countdown have ads?
Neither NMR Solvent Peaks nor Countdown shows ads.
Which is updated more often, NMR Solvent Peaks or Countdown?
NMR Solvent Peaks ships an update every 3 months, and Countdown every 10 days. Most recently, NMR Solvent Peaks was updated on June 1, 2026 and Countdown on September 25, 2026.

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