Comparison

Cela vs Ninja Mask

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

Head to head
About

Cela

Automatically detect and conceal license plates in photos with a single tap. Quickly prevent personal information from appearing in images before posting to social media or listing vehicles. Offers multiple removal methods and precise adjustment tools.

Highlights
  • Automatic license plate detection
  • Multiple removal options (fill, mosaic, AI fill)
  • Precision adjustment tools
  • Complete offline processing
  • Privacy-focused, no data upload
  • Selectable export formats and quality
Features
Read full description

【Celaとは】 写真に写ったナンバープレートを自動検出し、ワンタップで隠せるアプリです。 SNS投稿や車両写真の掲載前に、個人情報の写り込みをすばやく防げます。 【主な特徴】 ◆ 自動検出 - ナンバープレートを自動で見つけます。傾いたプレートにも対応 ◆ 3つの除去方法 - 塗りつぶし / モザイク(ぼかし)/ AIによる自然な背景補完 ◆ 精密調整 - 四隅をドラッグして検出範囲を微調整 ◆ 完全オフライン - インターネット接続不要、100%端末内で処理 ◆ プライバシー重視 - 写真データを外部に送信しません ◆ 書き出し形式を選択 - JPEG / PNG / HEIC と画質を設定可能 【こんな方におすすめ】 ・SNSに車の写真を投稿する方 ・中古車販売で車両写真を掲載する方 ・不動産写真で駐車場のナンバーを隠したい方 ・街の風景写真を共有する方 【使い方】 1. 写真を選ぶ 2. ナンバープレートを自動検出 3. 除去方法を選んで保存・共有 【対応ナンバープレート】 日本のナンバープレートの文字パターンに最適化しています。 ※ 検出結果は写真の条件によって異なります。共有前に仕上がりをご確認ください。 【プライバシー】 写真の処理はすべて端末内で完結します。 【Cela Proについて】 Cela Proは月額・年額(自動更新)と買い切りからお選びいただけます。無料版は1日5枚まで処理できます。 ・月額/年額プランは購入確認時にApple IDへ課金され、期間終了の24時間前までに解約しない限り自動更新されます。 ・購入後の管理・解約は「設定」>「Apple ID」>「サブスクリプション」から行えます。 利用規約: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Ninja Mask

Features
Read full description

You want to post a photo of your car, but not its licence plate. Ninja Mask takes care of that in one tap. Choose a photo and the app finds the licence plate and covers it. No hunting around with your finger, no smearing mosaic over the picture. WHAT IT DOES Finds plates automatically Pick a photo and the app looks for licence plates and covers each one with a solid panel. Handles several vehicles at once If more than one car or motorcycle appears in the same photo, each plate is covered. Follows the shape of angled plates Seen from an angle, a plate is not a rectangle. The mask is shaped to match, so it does not look pasted on. Blends with the colour underneath Sunset, night, deep shade — a plate looks different in each. The mask takes the colour of the actual plate beneath it, so the mood of the photo is kept. White, yellow and green plates are all supported. Adjust it yourself Tap a mask and handles appear at its corners. Drag a corner to reshape, the centre to move. Hold a corner and a magnifier appears for precise work. Pinch to zoom the photo. You can also add a mask by hand. Works with plates from other countries Not only Japanese plates — plates written in Latin characters are found too. Save or share straight away Save the edited photo to your library, or send it directly from the share sheet. YOUR PHOTOS STAY ON YOUR DEVICE Detection, masking and saving all happen on your iPhone. Your photos are never sent to a server. No account is required. GOOD FOR - Posting photos of your car or motorcycle - Sharing a wash, a build or a ride - Listing a used vehicle or parts for sale - Showing someone your parking space or garage PLEASE NOTE - Automatic detection depends on the photo. A plate that is very small, at an extreme angle, dark or blurred may be missed. When that happens, please position a mask by hand. - Saving creates a new image with the mask baked in. Your original photo is not changed. - This app displays advertisements.

Screenshots

Cela4 screens
Ninja Mask3 screens

Verdict

The call

The clearest difference is in-app purchases: Ninja Mask at none against Cela's 3. Ninja Mask also leads on iOS requirement (15.5 vs 18.0). Cela's advantage is ads (none vs shown) and update cadence (weekly vs every 3 weeks). On price 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

Both are free to download. Cela sells 3 in-app purchases, starting at $0.99 per month. Ninja Mask asks for nothing beyond the download.

UpkeepUpdate frequency

Cela ships an update weekly, Ninja Mask every 3 weeks. The most recent releases landed on November 7, 2026 and October 29, 2026 respectively.

Scorecard4 real differences · 4 level
Cela versus Ninja Mask: the parameters behind the verdict, then further details
ParameterCelaNinja Mask
PriceFreeFree
Positive reviews0.0% of reviews—
Update frequencyWeekly — betterEvery 3 weeks
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.5 — better
Further details — not scored
Size222 MB63 MB
Age rating4+4+
DeveloperUnderSoil, Inc.Noah's Ark Sapporo llc

In-app purchases

3 purchases

Cela

Subscriptions2
  • Cela Pro Monthly$0.991 Month
  • Cela Pro Yearly$9.991 Year
One-time1
  • Cela Pro Lifetime$2.99
None

Ninja Mask

No in-app purchases

Questions

Is Cela free?
Cela is free to download, with in-app purchases available.
Is Ninja Mask free?
Ninja Mask is free to download, with no in-app purchases.
Do Cela or Ninja Mask have ads?
Ninja Mask shows ads; Cela does not.
Which is updated more often, Cela or Ninja Mask?
Cela ships an update weekly, and Ninja Mask every 3 weeks. Most recently, Cela was updated on November 7, 2026 and Ninja Mask on October 29, 2026.

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