avAltimeter vs StampRecord
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
avAltimeter
This aviation-focused altimeter app provides accurate altitude readings using built-in pressure sensors. It offers Kollsman adjustment, density altitude calculations, and oxygen requirement warnings for increased flight safety.
- Kollsman adjustment for barometric pressure
- Density Altitude and True Airspeed calculation
- Automatic barometric pressure updates from airports
- Oxygen requirement warnings based on altitude
- Imperial/Metric unit selection
- Day/Night illumination modes
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Simple and Effective! avAltimeter is a digital, aviation-oriented altimeter. It is the only altimeter app which has the Kollsman adjustment so you can adjust the altimeter to the current barometer setting, or to 29.92 inches of mercury for the pressure altitude. Need a quick backup for your panel? avAltimeter uses the latest Apple and Bosch technology built into the iPhone 6 and later models. Earlier models of the iPhone and iPads before iPad Air 2 or Mini 4 do not have the required pressure sensing hardware and do not work. All iPad Pro models work too! Smart! avAltimeter calculates the temperature sensitive Density Altitude. Based on the Density Altitude, the app also calculates True Airspeed as a function of Indicated Airspeed. avAltimeter calculates a rough estimate of the increased required Take-Off distance from that at seal level from increased Density Altitude as well. You can even set the App to obtain automatically obtain the latest barometric pressure from the closest reporting airport. The barometer setting will auto-update every 20 minutes, or if you move more than 25 miles from your previous location. When using the live METAR update feature, the App will display which airport pressure it is using, and how old the reading is. This feature requires an internet connect and active GPS, so it will not work well if you are flying inside a jet. In a jet, the App works great to track the cabin pressure if you just leave the barometric pressure set at 29.92 inHg. Increased Safety! Know your oxygen requirements. avAltimeter tracks your altitude and provides a warning to use oxygen when you exceed FAA mandated limits. Customizable! avAltimeter is customizable. Choose Imperial or Metric units. Set the Altimeter Setting through a popup Kollsman window or by directly setting the field altitude. The field altitude can be set manually or automatically by GPS. Select Day or Night illumination. Turn the audio alarms for oxygen on or off. Improve the take-off performance estimate by selecting your propellor type: constant speed or fixed pitch. Sensitive! The Bosch sensor chip built in to the iPhone 6 and later is sensitive to changes in altitude of three feet or less and has an estimated range from -1500 feet to over 20,000 feet. Unique! Unlike other aviation apps, avAltimeter uses actual barometric pressure to calculate altitude, not a GPS estimate. The barometer is only available in iPhone 6 and later or the iPad iPad Air 2, Mini 4 as well as all iPad Pro! Legal Disclaimer This is an app, not an FAA approved flight instrument. It has not been certified as meeting the relevant TSO specifications. This app can not be used as a primary flight instrument.
StampRecord
Visually track your daily progress and habits with a customizable stamp system. Perfect for monitoring efforts in learning, fitness, or medication adherence, and for children to record achievements. Review your history to foster continuous improvement.
- Customizable stamps with emoji and summaries
- Daily record keeping
- Progress review for improvement
- Track language learning, diet, fitness
- Monitor medication intake
- Suitable for children's achievements
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Record your daily achievements with stamps using StampRecord! Who is it for? - People who want to keep a record of their daily efforts such as language learning, diet, muscle training, etc. to encourage them. - Children who want to record their help and study results and check with their parents. - People who want to record and check whether they have taken medicines. How to use 1. Add a stamp with a combination of emoji and summary. 2. Select the day you want to record and put a stamp on it. 3. Look back at your records and use them for daily improvement. Note: Developer may end support for older OS without notice.
Screenshots
Verdict
The clearest difference is review sentiment: StampRecord at 100% against avAltimeter's 50%. StampRecord also leads on price (Free vs $0.99). avAltimeter's advantage is rating (4.6 vs 4.0) and ratings volume (19 vs 1). On update cadence, 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
StampRecord is free to download; avAltimeter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
avAltimeter holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: avAltimeter has 19 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of avAltimeter's written reviews are positive against 100% of StampRecord's, so the app with the better star average is not the one people write more warmly about.
avAltimeter ships an update every 4 months, StampRecord every 2 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.
| Parameter | avAltimeter | StampRecord |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.6 (19 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 19 — better | 1 |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Aviametrix, LLC | Takuto Nakamura |
Customer experience
avAltimeter
StampRecord
In-app purchases
avAltimeter
No in-app purchases
StampRecord
No in-app purchases









