Postra Mobile vs DigiNega
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Postra Mobile
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Postra turns your camera roll into a single flow: find, compose, refine, and export. No tagging required — just open your photo library and let on-device AI understand your photos. Find the one shot • Recent, Random, or AI search to surface buried photos fast • Search by words like "flower" or "sky" with on-device AI text search • Tap any photo to gather visually similar ones • Filter freely by camera and lens Build photo collages • Grid, Free, and many Design templates for flexible layouts • Build several boards at once and export them together — great for finishing a tall composite as a multi-image post • Presets for Instagram, X, Threads, Stories, TikTok, YouTube, and Pinterest aspect ratios • "Preview" — see exactly how your post will look before sharing Refine • One-tap color presets, plus brightness, HSL, curves, and crop • Copy & paste adjustments to other photos Play — film and analog textures • Over 60 effects: film grain, halation, light leaks, double exposure, film scratches, mold, and more • Nearly 40 looks (presets) applied in a tap from a thumbnail sheet, from film-stock styles to cinematic grades • Fine-tune the strength of each effect in the detail settings Finish and export • Add a caption band with EXIF (camera, lens, aperture, date) • Print-style finishing with paper texture and drop shadow • High-quality export at each platform's aspect ratio, ready to share Privacy first • All analysis, layout, and export happen entirely on your device • Your original photos are never modified • No account, no tracking, no ads Note: AI text search downloads a search model (~146MB) once on first use. Your photos are never uploaded. For iPhone and iPad.
DigiNega
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DigiNegaは、デジタル写真から反転・調整し、フィルムライクなネガ画像として書き出すためのアプリです。 写真ライブラリから画像を1枚選び、フィルムモデル、露出補正、フィルムベース色を調整できます(Pro版のみ)。 用途に応じて書き出し解像度を選択できます。 操作方法 画面タップ・・・写真のインポート 画面長押し・・・インポートした写真の取り消し 下スワイプ・・・フィルム選択(Pro版のみ) 上スワイプ・・・画像の調整(Pro版のみ) 左スワイプ・・・書き出しメニュー DigiNega Proでは、追加のフィルムモデル、詳細な色調整、オリジナル解像度での書き出しを利用できます。 リリース時点で対応しているファイル形式はJPEG/PNG/TIFF/HEICです。 書き出されるファイル形式は取り込んだファイルと同じ形式ですが、TIFFは最大16bitでの書き出しとなります。
Screenshots
Verdict
The clearest difference is price: DigiNega at Free against Postra Mobile's $4.99. On update cadence, 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
DigiNega is free to download; Postra Mobile costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.
| Parameter | Postra Mobile | DigiNega |
|---|---|---|
| Price | $4.99 | Free — better |
| Update frequency | Every 3 days | Every 3 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 48 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Koji Chikazawa | Tomohiro endo |
In-app purchases
Postra Mobile
No in-app purchases
DigiNega
No in-app purchases








