Comparison

AST UPAS vs Speck Connect

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

Head to head

AST UPAS

Access Sensor Technologies

About

AST UPAS

Features

Read full description

Use this application to set sampling parameters for Access Sensor Technologies’ Ultrasonic Personal Aerosol Sampler (UPAS). Parameters that can be adjusted using this application include the name, cartridge id, start time, duration, flow rate, and duty cycle for each filter sample. Make sure any mobile device that you will use to program the UPAS is running iOS 12 or later.

About

Speck Connect

Features

Read full description

Blue Iris Labs™ is a pioneer in the precise measurement and control of spectral, biological, and circadian lighting systems in real places. Our dual mission is to use lighting to improve health, and increase efficiency in environments.

Screenshots

AST UPAS3 screens

Speck Connect4 screens

Verdict

The call

The clearest difference is update cadence: Speck Connect at monthly against AST UPAS's every 3 months. AST UPAS's advantage is iOS requirement (12.0 vs 16.6). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

AST UPAS ships an update every 3 months, Speck Connect monthly. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level

AST UPAS versus Speck Connect: the parameters behind the verdict, then further details
Parameter	AST UPAS	Speck Connect
Price	Free	Free
Update frequency	Every 3 months	Monthly — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	12.0 — better	16.6
Further details — not scored
Size	11 MB	116 MB
Age rating	4+	4+
Developer	Access Sensor Technologies	Blue Iris Labs

In-app purchases

None

AST UPAS

No in-app purchases

None

Speck Connect

No in-app purchases

Questions

Is AST UPAS free?

AST UPAS is free to download, with no in-app purchases.

Is Speck Connect free?

Speck Connect is free to download, with no in-app purchases.

Do AST UPAS or Speck Connect have ads?

Neither AST UPAS nor Speck Connect shows ads.

Which is updated more often, AST UPAS or Speck Connect?

AST UPAS ships an update every 3 months, and Speck Connect monthly. Most recently, AST UPAS was updated on October 27, 2026 and Speck Connect on October 25, 2026.