Comparison

Convertly vs Altimeter

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

Head to head
About

Convertly

Features
Read full description

A unit converter that is actually fast, and knows what things weigh. 13 categories, 124 units, and a real ingredient table: 112 foods with their proper densities, so a cup of flour and a cup of honey do not come out the same. No account, no sign-up, no waiting on a network. WHAT IT CONVERTS - Length, weight, temperature, volume, area, speed, time - Data, pressure, force, energy, power - Cooking, with grams, cups, tablespoons, teaspoons, millilitres and fluid ounces - Every result at once, so you do not pick the target unit before you can see the answer INGREDIENTS THAT WEIGH WHAT THEY WEIGH Flours, sugars, dairy and fats, liquids, nuts, grains, chocolate and fruit, each with real grams-per-cup. This is the part most converters get wrong. YOUR OWN INGREDIENTS No built-in table can know the specific flour you buy, your protein powder, or the starter in your fridge. Weigh one cup of it once, type the grams, and every conversion using it is right from then on. Free keeps three. CONVERTLY PRO - As many of your own ingredients as you want - Your full conversion history instead of the last 10 Converting is free and stays free. Favourites are unlimited and free. Nothing that was free in 1.0 moved behind the subscription. Convertly Pro is $2.99 per month or $19.99 per year, with 14 days free on the yearly plan. Payment is charged to your Apple Account at confirmation of purchase. Your subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your Apple Account settings. Terms of Use: https://thedolceway.com/terms Privacy Policy: https://thedolceway.com/privacy

About

Altimeter

Features
Read full description

See exactly how high you are. AltiMeter reads your live altitude, barometric pressure and oxygen level straight from your iPhone's built-in barometer and GPS โ€” an instant, accurate elevation gauge in your pocket. Most altitude apps stop at a single number. AltiMeter turns your phone into a full climb companion: record a hike or ascent, watch your gain and peak build in real time, then review the elevation profile of every trip. And because the barometric sensor needs no signal, your altitude keeps reading even deep in the backcountry with no cell service. WHAT YOU GET - Live altitude from GPS and the built-in barometer, updated as you move - Real-time air pressure in hPa with a plain-language conditions band - Oxygen level estimate so you can gauge thin air at high elevation - Record any climb and capture gain, peak, ascent, descent and range - Compare your height to Everest, K2, Mont Blanc, Fuji and more famous peaks - Atmosphere reference chart: pressure and oxygen at every elevation, meters or feet PERFECT FOR - Hikers and mountaineers tracking elevation on the trail - Cyclists and trail runners logging total ascent - Drone pilots and skiers checking altitude before takeoff or a run - Anyone curious how high their town, hotel or lookout really sits WHY NOT JUST CHECK THE BUILT-IN COMPASS? The Compass app shows one static altitude and nothing else. AltiMeter reads live pressure, estimates oxygen, records your whole climb as a chart you can revisit and export, and works offline through the barometer when GPS drops out. PRIVACY Every reading stays on your device. No account, no ads, no tracking. FULL ACCESS AltiMeter is free to see your live altitude, pressure and oxygen. Go Premium to record unlimited climbs, keep your full session history with detailed stats, and export any track to share or log. Premium is offered as a weekly or yearly subscription, or a one-time lifetime purchase, unlocking every feature the moment you upgrade. Open AltiMeter and read your altitude in one tap โ€” then start tracking your next climb. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? tphuc.work@gmail.com

Screenshots

Convertly4 screens
Altimeter4 screens

Verdict

The call

The clearest difference is in-app purchases: Convertly at none against Altimeter's 3. Altimeter's advantage is update cadence (every 4 weeks vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Altimeter sells 3 in-app purchases, starting at $2.99 per 7 days. Convertly asks for nothing beyond the download.

UpkeepUpdate frequency

Convertly ships an update every 5 months, Altimeter every 4 weeks. The most recent releases landed on October 6, 2026 and October 20, 2026 respectively.

Scorecard2 real differences ยท 4 level
Convertly versus Altimeter: the parameters behind the verdict, then further details
ParameterConvertlyAltimeter
PriceFreeFree
Update frequencyEvery 5 monthsEvery 4 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS17.017.0
Further details โ€” not scored
Size2 MB8 MB
Age rating4+4+
DeveloperDt novaPhuc Pham

In-app purchases

None

Convertly

No in-app purchases

3 purchases

Altimeter

Subscriptions2
  • Climb Log: Weekly$2.997 Days
  • Summit Height: Yearly$14.991 Year
One-time1
  • Offline Altitude: Pay Once$29.99

Questions

Is Convertly free?
Convertly is free to download, with no in-app purchases.
Is Altimeter free?
Altimeter is free to download, with in-app purchases available.
Do Convertly or Altimeter have ads?
Neither Convertly nor Altimeter shows ads.
Which is updated more often, Convertly or Altimeter?
Convertly ships an update every 5 months, and Altimeter every 4 weeks. Most recently, Convertly was updated on October 6, 2026 and Altimeter on October 20, 2026.

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