# NMR Solvent Peaks vs Countdown

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.

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.

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.

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.

## The numbers

| Metric | NMR Solvent Peaks | Countdown |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/nmr-solvent-peaks/id1293462223/reviews)** | [4.7 (3K ratings)](https://appshunter.io/ios/app/countdown-pretty-progress/id1597616326/reviews) |
| Number of ratings | 11 | **3K** |
| Positive reviews | **100.0% of reviews** | 81.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 183 MB |
| Requires iOS | **15.5** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Lucas Moore](https://appshunter.io/developer/1293462222) | [keinois OU](https://appshunter.io/developer/1597616328) |

## What reviewers say

### NMR Solvent Peaks

[App page](https://appshunter.io/ios/app/nmr-solvent-peaks/id1293462223)

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

**In-app purchases:** none


### Countdown

[App page](https://appshunter.io/ios/app/countdown-pretty-progress/id1597616326)

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:** macOS Compatibility, Family Sharing, Apple Watch app

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $1.99 | per month |
| Unlimited access | $2.99 | per month |
| Pretty Progress PRO (Weekly) | $4.99 | per 7 days |
| Pretty Progress PRO (Weekly) | $4.99 | per 7 days |
| Pretty Progress PRO (Monthly) | $4.99 | per month |
| Unlimited access | $5.99 | per year |
| Unlimited access | $8.99 | per year |
| Pretty Progress Pro (Annual) | $14.99 | per year |
| Pretty Progress Pro (Annual) | $24.99 | per year |
| Pretty Progress Pro (Annual) | $24.99 | per year |
| Pretty Progress PRO (Lifetime) | $29.99 | one-time |
| Pretty Progress PRO (Lifetime) | $34.99 | one-time |
| Pretty Progress PRO (Lifetime) | $49.99 | one-time |
| Pretty Progress PRO (Lifetime) | $59.99 | one-time |

**What reviewers like**

- 👍 Handy and useful app
- 🚀 Helpful for tracking goals and projects
- 💡 Great customization options
- 👍 Sleek and visually appealing design
- 👍 Seamless integration with Apple ecosystem

**What reviewers complain about**

- 🔒 Limited functionality in free version
- 💰 Paid features can be expensive for some users
- 🐛 Occasional bugs and glitches reported
- 🔒 Restricted customization options without paying

**Reported bugs**

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

**Requested features**

- 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


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*