Spectrometry vs DAC App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spectrometry
This application allows students and teachers to conduct spectrometry experiments using a wireless spectrometer. It measures and analyzes absorbance, transmittance, and fluorescence, supporting full spectrum analysis and Beer's law experiments. The software offers tools for calibration, comparison, and data plotting for educational purposes.
- Measure absorbance, transmittance, fluorescence
- Full spectrum analysis
- Beer's law and kinetics experiments
- Compare multiple spectra
- Calibrate dark and reference spectra
- Plot absorbance and transmittance
- Determine unknown concentration
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PASCO Spectrometry is specifically designed for all levels of students and teachers to integrate spectrometry into the teaching and learning of physics, chemistry and biology. Simply connect a PASCO Wireless Spectrometer (PS-2600) and insert a solution to measure absorbance, transmittance and fluorescence of solutions. The Spectrometry software specifically supports full spectrum analysis along with Beer’s law and kinetics experiments. Use a PASCO Fiber Optics Cable (PS-2601) to easily analyze the spectrum of light emissions. Key features: • Measure and analyze intensity, absorbance, transmittance and fluorescence. • Auto-set the integration time to determine optimum spectrum • Compare multiple spectra to each other and to a set of reference lines of common elements including Hydrogen, Helium, Mercury and more • Quickly calibrate dark and reference spectra for solution spectrometry • Plot absorbance and transmittance on the same graph • Apply a linear fit to determine relationships • Determine unknown concentration based on standard curves and user feedback • Calculate inverse and natural logarithmic data with built-in calculator functions • Annotate the graph • Take Snapshots of pages for journaling and assessments Common user experience across platforms: Spectrometry provides the same user experience for tablets and computers. No matter the mix of technology in the classroom or the school, teachers and students all share the same user experience--placing the learning experience in the forefront and simplifying classroom management. Awards: • 2015 SIIA CODiE award, Best Education App for a Mobile Device (Finalist) • 2015 BETT award, Digital Devices (Finalist) for the Spectrometer + Spectrometry app Equipment and accessory: The Wireless Spectrometer (PS-2600) and the Fiber Optic Accessory (PS-2601) can be found at pasco.com/spectrometer About PASCO: PASCO Scientific brings a rich history of innovation and support for science education, with 50 years of service to educators around the world.
DAC App
This free application simplifies the recording of student audio responses for specific AP exams. It streamlines the process for both students and proctors, and automatically uploads audio files for school staff. Designed for use on school-issued iPads.
- Record audio responses for AP exams
- Simplify recording process
- Intuitive interface for students
- Streamline post-exam tasks
- Direct upload of audio files
- Designed for school-owned iPads
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The Digital Audio Capture (DAC) app is a free app developed by College Board and ETS to use for recording students’ audio responses for the AP Music Theory Exam and AP French, German, Italian, and Spanish Language and Culture Exams. This app has been developed to simplify the recording process for students and proctors, utilizing current technology that is intuitive to most students. It streamlines post-exam tasks for school staff by directly uploading student audio files after recording. School staff will follow the instructions in the 2025-26 AP Exam Instructions book to administer an exam using the DAC app. NOTE: The DAC app is limited for use on school-owned and -controlled iPad tablets (iOS 15.0 and above). Schools must update to the 2026 version of the DAC app; previous versions of the app will not work in 2026.
Verdict
The clearest difference is review sentiment: Spectrometry at 100% against DAC App's 20%. Spectrometry also leads on rating (4.0 vs 1.8) and iOS requirement (11.0 vs 15.0). DAC App's advantage is ratings volume (16 vs 4). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Spectrometry holds the better App Store score, 4.0 against 1.8. Both are backed by a comparable volume of ratings — 4 and 16 respectively. Written reviews point the same way: 100% of Spectrometry's written reviews are positive against 20% of DAC App's.
Spectrometry ships an update every 6 months, DAC App every 12 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | Spectrometry | DAC App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | 1.8 (16 ratings) |
| Positive reviews | 100.0% of reviews — better | 20.0% of reviews |
| Number of ratings | 4 | 16 — better |
| Update frequency | Every 6 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPad |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 43 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | PASCO scientific | Educational Testing Service |
Customer experience
Spectrometry
DAC App
In-app purchases
Spectrometry
No in-app purchases
DAC App
No in-app purchases








