Comparison

基準点ナビ vs FieldSketch

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

Head to head
About

基準点ナビ

Features
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現場で基準点(公共基準点・座標既知点)を素早く見つけるための、測量者・土木技術者向けアプリです。 ■ できること ・現在地の平面直角座標(1〜19系)をリアルタイム表示 ・基準点データ(CSV/SIMA)を取り込み、選んだ点まで矢印+残距離でナビ。残り5mで「この辺りを探す」表示に切替 ・カメラ誘導 — カメラ映像に目標方向のピンを重ねて表示 ・図面と歩く — DXF平面図を現地合わせ(2点法/1点+方向法)で地図に重ね、図面の中を現在地マーカーが動く ・図面タップでナビ — 地図に重ねた図面の上を長押しするだけで、その場所へナビできます。近くの線の端や折れ点、円・円弧の中心や端点に吸い付いてピンが立ち、「ここへナビ」で矢印+残距離の案内がそのまま始まります。保存は任意で、名前を付ければ基準点と同じリストに並び、CSV/SIMAで書き出せます。図面がまだ現地に合っていないときは、その旨を表示して「地図上の地点」として区別します ・地図の長押しで任意地点の座標を確認(平面直角座標⇔緯度経度) ・ベースマップ: 地理院地図(標準/淡色/写真)・Appleマップ・白図(オフラインの紙図面感覚) ■ ファイル取込 ・基準点: CSV(点名,X,Y[,Z])/SIMA(.sim)。TREND系の列並びも自動判別 ・図面: DXF(DWGはCADからDXF書き出しで対応) ・Dropbox/Googleドライブ/OneDrive等の共有シートやファイルAppから取込可能 ■ 精度について iPhone内蔵GNSS(数m級)を使用します。基準点の「おおよその位置」を素早く掴む用途に最適化しており、検測・出来形計測などの成果用途には使用できません。座標変換の演算部は国土地理院の計算式に基づき、既知点で1mm以内の一致を検証済みです(GNSS測位精度とは別)。図面から読み取った点へのナビには、GNSS誤差に加えて図面の現地合わせのズレが重なります(両者は画面上で分けて表示します)。 ■ 安心設計 ・アカウント登録不要・広告なし ・位置情報や取込データはすべて端末内で処理され、外部送信されません ■ 動作環境 iOS 17以上 / iPhone専用 地図表示には通信が必要です(地理院タイル: 出典表示のうえ利用)

About

FieldSketch

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Survey and draft — all by yourself. The site inspection app built for architects. ■ No more two-person tape measure walks FieldSketch uses your iPhone's motion sensors to measure distances as you walk. Aim the crosshair, tap to drop a pin. One site in 10 minutes, calibration included. No need to book an assistant. ■ CAD drawings straight from the field Export as DXF (R12) — opens directly in Jw_cad and other CAD software. Register a cadastral PDF in advance and the app automatically merges it with your field data. ■ Everything captured in one place Photos are taken automatically at each measurement point. Record video while you measure to document the site. Points, distances, and photos compiled into a PDF report — ready for same-day delivery. ■ 4 simple steps Calibration → Site boundary → Surroundings (gutters, roads) → Landmarks (manholes, etc.). Guided workflow. Easy to undo and redo. ■ Accuracy Approx. 3 cm error over 30 m (verified on device). No LiDAR required — works on any iPhone. A 3-point calibration at the start improves accuracy further. ※ Designed for site reconnaissance and planning. Not intended for legal boundary surveys. ■ Pricing Measurement, photos, video, and PDF export are free forever. CAD (DXF) and CSV export require a Premium plan (monthly / lifetime). Try all features free for 14 days. Terms of Use (EULA) By downloading or using this app, you agree to Apple’s standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

基準点ナビ4 screens
FieldSketch4 screens

Verdict

The call

The clearest difference is in-app purchases: 基準点ナビ at none against FieldSketch's 3. FieldSketch's advantage is update cadence (fortnightly vs every 2 months). On price, ads, device support and iOS requirement 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. FieldSketch sells 3 in-app purchases, starting at $24.99 per month. 基準点ナビ asks for nothing beyond the download.

UpkeepUpdate frequency

基準点ナビ ships an update every 2 months, FieldSketch fortnightly. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 4 level
基準点ナビ versus FieldSketch: the parameters behind the verdict, then further details
Parameter基準点ナビFieldSketch
PriceFreeFree
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size2 MB12 MB
Age rating4+4+
DeveloperTakashi Jotaniryota kido

In-app purchases

None

基準点ナビ

No in-app purchases

3 purchases

FieldSketch

Subscriptions1
  • com.ryota.FieldSketch.monthly$24.991 Month
One-time2
  • com.ryota.FieldSketch.prooffer$279.99
  • com.ryota.FieldSketch.pro$349.99

Questions

Is 基準点ナビ free?
基準点ナビ is free to download, with no in-app purchases.
Is FieldSketch free?
FieldSketch is free to download, with in-app purchases available.
Do 基準点ナビ or FieldSketch have ads?
Neither 基準点ナビ nor FieldSketch shows ads.
Which is updated more often, 基準点ナビ or FieldSketch?
基準点ナビ ships an update every 2 months, and FieldSketch fortnightly. Most recently, 基準点ナビ was updated on October 31, 2026 and FieldSketch on November 10, 2026.

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