Comparison

Thermal Cam vs EV Calc

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

Head to head
About

Thermal Cam

This app displays infrared camera images on your iPhone or iPad by tethering. It allows for temperature measurement, contrast adjustment, and saving 2D/3D images. Requires separate infrared camera hardware.

Highlights
  • Tethered infrared camera image display
  • Temperature measurement by tapping
  • Adjustable contrast for images
  • 2D and 3D image saving
  • Multiple color settings for infrared video
  • Remote viewing up to 50 meters
Features
Read full description

"Thermal Cam" is an application that displays small, lightweight, low power consumption infrared camera (FLIR LEPTON 1) images on iPhone or iPad by tethering. Please note that the same application "Thermal Cam 3” is exclusively for FLIR LEPTON 3. "Thermal Cam" requires separate parts. Please check the following URL for used parts and source of infrared camera side.  http://takesan.hatenablog.com/entry/2017/09/23/172259 "Thermal Cam" -> Ultra compact infrared cameras prepared separately You can check images from distant places (normally maximum 30 m - 50 m) by using the tethering function of iPhone. -> Since infrared cameras are compact and lightweight and have low power consumption, they can be installed in ultra-small TOY drone, including fixed position observation. - WIFI port number can be changed from iPhone. - Infrared movie can set six kinds of color. - 3D point cloud images can be displayed so that temperature bands can be recognized by visually impaired people as well as ordinary 2D screens. - Contrast can be adjusted even when a street including "sky" with a large temperature difference in the image and "flames" etc., - Tap the necessary part of iPhone display to measure the temperature of that part. - 2D, 3D images can be stored in the camera roll. Although you can transfer the copied movie by e-mail, it is recommended that you upload it to a video site or iCloud because the file size is large. - Maximum minimum temperature scale, arbitrary temperature, dynamic range correction, date and time displayed in the image can be saved as they are. "Thermal Cam" can be used on iPhone installed with iOS 11.2 or higher. following models has been tested - iPhone 6 - iPhone 6 Plus - iPhone SE - iPhone 7 - iPhone 7 Plus - iPhone X - iPad mini4 - iPad Air2 iPhone 8,8Plus is confirmed to work only with Simulator. About the usage of iPhone and iPad batteries of "W & T Thermal Cam". - Because the tethering function is used during use, the battery may be consumed to a large extent. About the use of "W & T Thermal Cam". - If you turn on Bluetooth on the iPhone or iPad during use, the frames rate picture(fps) becomes remarkably low. Be sure to turn off Bluetooth. - Also too many Wifi points surrounded or 2.4Ghz radio, the fps becomes remarkable low. ************************************************************************************* 「Thermal Cam」は小型、軽量、低消費電力の赤外線カメラ(FLIR LEPTON1)画像をテザリングでiPhoneまたはiPadに表示するアプリです。  同様のアプリケーション「Thermal Cam3」はFLIR LEPTON3専用なのでご注意ください。 「Thermal Cam1」は別途部品が必要です。赤外線カメラ側の使用部品、ソースは次のURLをご確認下さい。     http://takesan.hatenablog.com/entry/2017/09/23/172259 「Thermal Cam」は -> 別途用意した超小型赤外線カメラ画像をiPhoneのテザリング機能を利用して、離れた場所(最長で30m~50m)から確認できます。 -> 赤外線カメラは小型軽量、低消費電力であるため、定位置観測を始め超小型トイドローンにも搭載可能です。 - WIFIのポート番号はiPhoneから変更可能です。 - 赤外線動画は4種類のカラー設定ができます。 - 通常の2D画面はもちろん、視覚障害のある方でも温度帯が認識できるように、3Dポイントクラウド画像の表示ができます。 - 画像中で温度差が大きい「空」を含んだ街路や「炎」などが入った場合でも、コントラスト調整ができます。 - 画像の温度測定必要部分をタップすると、その部分の温度測定ができます。 - 2D、3D画像はカメラロールに保存可能。写した動画はメールで転送ができますが、ファイル容量が大きいので動画サイトやiCloudにアップロードすることをお勧めします。 - 画像中に表示された、最高最低温度スケール、任意温度、ダイナミックレンジ補正、日付と時刻はそのまま保存できます。 「Thermal Cam」はiOS 11.2以上がインストールされた端末で利用できます。 動作済み端末は以下の通りです - iPhone 6 - iPhone 6 Plus - iPhone SE - iPhone 7 - iPhone 7 Plus - iPhone X - iPad mini4 - iPad Air2  iPhine 8,8Plusはシュミレーターでのみ動作確認しています。 「W&T Thermal Cam」のiPhone、iPadバッテリー使用量について。 - 使用中はテザリング機能を使うため、バッテリーを大きく消費する場合があります。 - 使用中GPSを利用する場合は、バッテリーを大きく消費する場合があります。 「W&T Thermal Cam」の使用に関して。 -使用中iPhoneまたはiPadのBluetoothをONにすると、著しく動画の動きが遅くなります。必ずBluetoothをOFFにして下さい。 -WiFi中継点が多いなど周囲の環境により、著しく動画の動きが遅くなる場合があります。

About

EV Calc

Features
Read full description

EV Calc shows, at a glance, how much a change in your camera settings affects brightness, measured in stops. Store your reference exposure with "SET", then turn the shutter, aperture, ISO and ND wheels. The difference from your reference appears large at the center of the screen, such as "+0.7" or "-1.3". Use it as a guide for how much to compensate after adding an ND filter or changing aperture or ISO. KEY FEATURES • Four wheels for shutter, aperture, ISO and ND filter • "SET" stores your reference exposure and shows the difference in stops (positive is brighter, negative is darker) • Color coding: your reference value in green, brighter options in orange, darker options in blue • Reference EV and current EV are always visible • Shutter angle shown like "1/48 (180°)". Choose the frame rate from 23.98, 24, 25, 29.97, 30, 50, 59.94, 60 or 120 fps, or turn the display off • ISO step: 1 stop, 1/2 stop or 1/3 stop • ND filter unit: density (such as 0.3), ND number (such as ND8) or stops (such as 3 stops) • Remembers your last settings and resumes where you left off • Landscape-only, dark-mode interface that is easy to read on set • No account and no network connection required NOTE Displayed exposure differences and EV values are theoretical. Actual exposure may differ depending on your camera and lens. Please use them as a guide.

Screenshots

Thermal Cam4 screens
EV Calc2 screens

Verdict

The call

The clearest difference is price: Thermal Cam at Free against EV Calc's $0.49. Thermal Cam also leads on iOS requirement (11.2 vs 17.0). EV Calc's advantage is update cadence (every 2 days vs every 8 months). On 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

Thermal Cam is free to download; EV Calc costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Thermal Cam ships an update every 8 months, EV Calc every 2 days. The most recent releases landed on October 18, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 7 level
Thermal Cam versus EV Calc: the parameters behind the verdict, then further details
ParameterThermal CamEV Calc
PriceFree — better$0.49
Rating2.6 (5 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings5 — better—
Update frequencyEvery 8 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.2 — better17.0
Further details — not scored
Size10 MB0 MB
Age rating17+4+
DeveloperONO TAKESHIAkihiro Sakai

In-app purchases

None

Thermal Cam

No in-app purchases

None

EV Calc

No in-app purchases

Questions

Is Thermal Cam free?
Thermal Cam is free to download, with no in-app purchases.
Is EV Calc free?
EV Calc costs $0.49, with no in-app purchases.
Do Thermal Cam or EV Calc have ads?
Neither Thermal Cam nor EV Calc shows ads.
Which is updated more often, Thermal Cam or EV Calc?
Thermal Cam ships an update every 8 months, and EV Calc every 2 days. Most recently, Thermal Cam was updated on October 18, 2026 and EV Calc on October 12, 2026.

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