Lux Meter vs いまここ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lux Meter
This tool transforms your iPhone into a professional light meter, measuring illuminance in lux and foot-candles in real-time. It offers exposure calculations, color temperature estimates, and various presets for different use cases, all while working offline and without ads.
- Real-time lux and foot-candle readout
- Exposure Value (EV) calculation
- Color temperature (CCT) estimate
- Spot or average metering
- Use-case presets
- CSV export of readings
- 100% offline functionality
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Lux Meter turns your iPhone into a professional light meter. Using the camera and the ISO 2720 photographic standard, it measures illuminance in lux and foot-candles in real time. Whether you're setting up studio lighting, checking your desk for eye comfort, dialing in grow lights for your plants or metering a film scene, Lux Meter gives you the numbers the pros rely on. MEASURE • Real-time lux and foot-candle readout with a one-tap unit switch • Exposure Value (EV) and color temperature (CCT in Kelvin) • Spot metering on a reticle in the middle of the camera view, or average metering of the whole frame • Live histogram, min / max / average and a live chart • A/B compare: pin a reading as the reference and see the difference in EV and percent • Lock a reading, and a low-light path that reads below 1 lux ROOM SURVEY (Premium) • Measure a grid of points across a room and see it as a heat map • Average, minimum, maximum and uniformity (U₀), checked against workplace targets for offices, classrooms, workshops, retail and corridors, or your own target • Share the result as a PDF report EXPOSURE CALCULATOR • Set two of aperture, shutter and ISO — it solves the third • ND filter, exposure compensation and a Sunny 16 helper • Cinema mode with frame rate, shutter angle and the 180° rule, plus a depth-of-field calculator (Premium) GROW LIGHT (Premium) • Turn a reading into PPFD and Daily Light Integral (DLI) for sunlight, LED, HPS, metal-halide or fluorescent light • Photoperiod setting and a light guide for low- to high-light plants TARGETS & FEEDBACK • Presets for reading, office, photography, film, plants and aquariums • Target band with an in-range indicator • Optional haptic and audio meter tick that speeds up as the light gets brighter CALIBRATION • Separate calibration for the front and back cameras, with raw and calibrated values side by side • Manual multiplier, plus multi-point calibration across the whole range (Premium) HISTORY & REPORTS • Save single readings or record the light over time, with notes and an optional location tag • Chart and statistics for every recording • PDF reports and CSV export (Premium) LUX METER PREMIUM A one-time purchase, no subscription. Unlocks Room Survey, PDF reports, unlimited history and recording time, CSV export, multi-point calibration, Grow Light, cinema mode and depth of field. MORE • 11 languages with instant in-app switching • Dark design with a light mode, grid overlay, brightness pin and keep-awake A note on accuracy: iOS does not give apps access to the ambient light sensor, so Lux Meter uses camera-based reflective metering (ISO 2720). For the best results, calibrate once against a reference meter. Measure light like a pro. Download Lux Meter.
いまここ
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「いまここ」は、あなたの現在地(緯度・経度)を瞬時に取得し、ワンタップでコピーできる究極のシンプルツールです。 【こんな時に便利!】 ・待ち合わせで自分の正確な居場所を教えたいとき ・地図アプリでの検索や記録に緯度経度を使いたいとき ・アウトドアや釣り、登山などで特定のポイントをメモしたいとき ・緊急時に自分の位置を正確に伝えたいとき 【主な機能】 ・**ワンタップ取得&コピー**: ボタン一つで緯度経度を取得し、そのままクリップボードへ保存します。 ・**スムーズな共有**: コピーした座標は、LINEやメール、各種SNS、地図アプリへ簡単に貼り付け可能です。 ・**初心者にも優しい**: わかりやすいチュートリアルガイド付きで、どなたでも迷わず使えます。 ・**ダークモード対応**: 夜間や暗い場所でも目に優しいデザインを採用しています。 ・**データ移行機能**: 設定のエクスポート・インポートに対応。機種変更時の引き継ぎも安心です。 余計な機能は一切なし。 「今、自分がどこにいるか」を伝えるためだけの、最速・最小アプリです。
Screenshots
Verdict
The clearest difference is in-app purchases: いまここ at none against Lux Meter's 1. いまここ also leads on update cadence (every 2 days vs weekly) and iOS requirement (15.0 vs 17.0). On price, ads 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
Both are free to download. Lux Meter sells 1 one-off in-app purchase. いまここ asks for nothing beyond the download.
Lux Meter ships an update weekly, いまここ every 2 days. The most recent releases landed on October 29, 2026 and October 20, 2026 respectively.
| Parameter | Lux Meter | いまここ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (6 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Weekly | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Alper Sumer Guc | TOMOKAZU GOTO |
In-app purchases
Lux Meter
- Lux Meter Premium$2.99
いまここ
No in-app purchases









